echoing the two posts above, I'm going to give my opinion on frosmoth and bruxish, but I'll also add a paragraph on the one thing I consider to be the most ridiculous in the current metagame:

this thing is simply ridiculous. it has extremely high damage output, is the one quiver dancer that isn't at least neutered in some way by the corios and just takes a whole other dimension with tera allowing it to set-up in the face of every single special attacker in the tier. this Pokemon is something you can't give a free turn to, because if you do, it can easily set-up more than 1 quiver dance signing the end of the game for you. that would make you stand a chance against moth, however, only if you have a form of speed controle that outpaces it at +1 like scarf passi, scarf medi, scarf pauros, or if you have one of: spd croc that you'd have to tera, chansey, max spd haze vapo (honestly who), max spd umbreon. and even most of those aren't 100% safe against specific tera types and/or moveslots. moth puts up so much pressure in game that every single mon on your team gets its proficiency accrued. your physical attackers will have an easier time pivoting because the likes of blimp, dachsbun or even sanda mostly give frosmoth a free turn, the opponent will often want to save their moth check's health which makes them usually play with 5 mons subconsciously. moth literally transforms any game into a guessing game version of terror, as there's low-key nothing that's 100% safe into it, and if you don't wanna gamble on which tera frosmoth is going to use, ghost to plow through chansey and have an easier time setting up on locked fighting types like passimian, ground or fire to break through copper, muk, and steel type tera mons as well as getting better set-up opportunities into defensive mons that would be packing rock / steel moves, electric to avoid paralysis and dish out strong bolt-beam coverage after setting up, tera fairy also helps with the aforementioned fighting types as well as doesn't let you get dragged out by dragon-tail from av eelektross and tera-fairy appletun, the list goes on and on and atp if you don't wanna gamble into frosmoth you're probably mandated to pack a random phazer that would have to tera most of the time like blimp, muk, vapo or whirlwind copper. yes, all of its checks are already top mons in the metagame, yes they aren't used solely to check frosmoth, but the real deal is that in game vs frosmoth, you would most likely have to use them solely as a moth check because otherwise you would lose to it, or you'd have to pack multiple passive mons in order to stand a chance. idt frosmoth is an unstoppable force, but it is certainly restrictive enough both in the builder and in game to be banned imo.

this thing is getting what I like to call the Medicham syndrome. this syndrome is basically when people see a mon that seems completely broken and they don't want to lose against it, they just happen to find countermeasures that become really popular and aforementioned broken mons falls into mediocrity. first case of this was Medicham this gen, who admittedly has no switch-ins in nu let's be real, but still managed to suck ass for the first month because everyone was so fucking obsessed with it that nothing on teams gave it free turns and its subpar bulk/offensive typing/speed stat didn't give it enough opportunities. Bruxish is kind of in this position rn, (which btw has made Medicham a bit better but this is not today's post concern) where everyone is starting to be overly obsessed with not losing to it, and therefore don't pack random ass weaklings that give it free turns. its bulk and offensive typing are somehow even worse than Medicham's but they for sure are backed-up by it's very good speedtier. having 311 speed is rly good down here, and is what makes it a bit borderline in my opinion. however, given how frail it and how bad its general defensive profile is into the metagame, it really struggles to get in. being weak to knock and turn when the most used Pokemon in the tier is passimian sucks, having 311 speed in a tier ruled by corios sucks, although now that both sensu and pompom are gone it's a bit less of a problem for it and might prove to be an issue for the tier in the near future. but for now, I simply don't see it anymore, I think Bruxish is not as broken as people would like to think it is, on top of getting medichamed, we have a lot of common defensive Pokemon that can keep it in check such as phys-def umbreon, tera dark vapo, drifblim, tera water sanda, appletun etc... as well as cacturne but watch out for poison fangs. I think this guy might deserve a suspect down the line, but for now I'd probably not do anything.

the real demon behind this tier, the fucking evil dark fox whatever the fuck that is supposed to be is in my opinion the most broken Pokemon in nu rn. put simply, there's nothing that switches safely into this guy depending in its set, and for gods sake does it have many. specs sets shred appart most teams that don't pack either umbreon or chansey (which are susceptible to get tricked down the line and struggle to check zoro afterwards), if you think specs sets are fine, wait until you see sub np ones. expected both of those? take a banded tera dark knock off to the throat and lose your special wall. the list goes on and on and I don't think set variety has ever been an argument to address sheer brokenness anyway, but when each set has such little counterplay, it's already a bit alarming. but what pushes this guy over the edge in my opinion is the illusion mind games. Illusion just makes the notion of check disappear, especially knowing that if the mon Zoro's disguised into has tera'd, it copies the tera type??? you simply can't send in your umbreon anymore scouting for which zoro set it's going to be since it's going to be disguised as a passi. what in the absolute fuck are you supposed to do if a CC comes your way, you go sanda/blimp and you get ohkoed by specs tera dark dark pulse. you have to guess every time a Pokemon comes in whether or not it's zoro, remember throughout the game at what percent you left every Pokemon because you can't just check during the turn you're against the zoro as ps will show you both the mon used as the disguise and zoro at the same percentage no matter how much dmg you dealt to either. illusion has always been a pain in the ass to deal with throughout generations, but this gen we don't have sturdy enough defensive counterplay to deal with Zoro's shenanigans. oh also, fun part, this thing makes moth 100 times more demonic than it should be just by existing :). I think if no council vote is held for a quick ban (which I would honestly advocate for as I think zoro is 100% worthy of a quickban and that waiting further for this guy is completely unnecessary) I would at least advocate for a suspect test to happen alongside moth's.
I would love to see more discussion around these meta threats, so I encourage everyone to post their opinion on these guys. discussion only makes for healthier, better environments, and allows for nu's continuous growth as a community and as a tier, so I'm inviting you to contribute to it, even in the slightest :D.