Ok as i said before I'm gonna copy paste my previous comment as it is now truly applicable to the situation.
So no this is not a spam post and i feel like its a good starting point to a post dynamax discussion.
Winners




Almost every single wall in the tier
A lack of a get out of jail button will have a peculiar effect on this metagame. Walls like Toxapex and Tangrowth will fare much better since the Pokemon they are supposed to check no longer can break through them unfairly.




Mega Evolutions
Mega Blastoise will probably become one of the premier setup sweepers since he can setup without dynamax. A lack of ditto that dynamax's ban will cause means that his sweeps won't be able to stopped as easily.


Z Moves Users
Z Moves users now are not at as much of a disadvantage, since now everyone has an equal playing field. I think Kommo-O stands out the most as the double omniboost he can now setup will be a real threat. Darkinium Z Hydreigon is probably substantially more powerful.


Unaware Users
Unaware users have middling bulk to make up for their ability to disregard boosts. Without dynamax they are more liable to being able to stomach hits.
Dugtrio
Dugtrio, who does not benefit from Dynamax at all, will have an easier time trapping opponents who can't turn giga at a button press.







Stall
Yay Stall is no longer a troll option! Its just...bad now, I guess, similar to the state it was at the end of SM. The only noteworthy shit we got this gen was Deoxys-Defense (who we have found to be useless) and Corsola-Galar, who isn't honestly that bulky. Sub Toxic Aegislash is really good but its not unique to Stall either. Dynamax ban is a monumental buff to it but without a way to handle an ever-increasing offensive meta I simply cannot see Stall becoming a dominant playstyle anytime soon. I mean look at the power creep. Mega Sableye is too squishy these days. Mega Metagross's presence in the tier terrifies Chansey and Clefable. Stall needs a number of truly sturdy walls to resurface honestly, particularly a genuinely bulky Unaware wall and more Defog users.
Monkey
Darm will find it easy to pick off the majority of the tier since they can't double their HP at will.
Losers



Max Airstream Users
Hahahaha! Abusers of an unfair and unhealthy mechanic are kinda gonna fall out. Kartana will still be viable, of course, but I can't see Gyarados remaining as good. Flyinium Z will be alright but not crazy. Togekiss, on the other hand, will fall out of favor. Fast. As far as I know Salamence has no real good offensive potential and Wish Mence is....bad. The age of mons carrying Hidden Power Flying for that sweet Moxie boost is over.
:melmetal-gigantamax::snorlax-gigantamax::centiskorch-gigantamax:
Gigantamax
Granted Gigantamax was just a design change on bad mons, and the exclusive moves they got were usually worse than the normal ones, but they lose a big part of their individuality.

Dynamax-Reliant Setup Sweepers
Pokemon like Magearna who fucking snowballed outta control after one Shift Gear are gonna find it harder to make do with BoltBeam coverage.



:tapukoko:
Dual Screens / Hyper Offense
Oh man both playstyles rightly got a huge nerf now, thank fucking jesus. Other playstyles besides Dual Screens + Shift Gear GG and Electric Terrain + Max Knuckle may actually finally usable. Lol who am I kidding? But seriously its finally a crippling a nerf to these playstyles who will remain incredibly powerful but (hopefully) not quite as meta defining.


Sand
Sand is already dead until Vish gets Sand Rush for the reasons I stated earlier but Excadrill losing the ability to set up his own sand and sandaconda losing gigantamax hurts.


Sun
Torkoal doesnt have any recovery so hes liable to get killed if you dont watch it. Which leaves you with Ninetales and MCY as your sole remaining drought users lol. Weather Ball buff for Venusaur is good but now he cant set his own sun, and his offenses aren't that good without a growth boost.


Rain
Since the majority of the swift swim users now cannot set their own rain Barraskewda is now useless. Also Beartic I guess, his stats are actually pretty good. Unfortunately, Pelipper is super hardy so its not like Rain has any trouble keeping weather throughout the match like sun or sand lacking hippowdon.





Hail
Poor Hail, the removal of dynamax will be a huge a dropkick in the nuts for Hail and Ice in general, which is a shame cause this gen was initially shaping up to be the renassiance of Ice types. Kyurem-Black got DD and Ice STAB, Avalugg and Vanilluxe got Aurora Veil, Hail finally got a reliable sweeper/pivot in Eiscue, and Darm exists. But yeah no Kyub was banned, Darm is about to be banned and basically has nothing to do with Hail and the larger ice type, Eiscue turned out to be little more than an annoying gimmick, Mega Abomasnow is still useless as a hail setter, scarf abomasnow is not good, and Vanilluxe doesnt have the recovery or offensive movepool to become a contender for a viable hail setter. Avalugg can't fit Aurora Veil on his moveset anyways, leaving Ninetales to be the sole hail setter in Hail. Its sad, really, because Max Hailstorm was at least alright but for some reason Game Freak has a hard on for making potentially viable hail sweepers (sandslash, beartic, arctovish) have unusable speed even when boosted. And throughout the gens hail has always been somewhat of a joke, even when Stallrein existed. I think it has something to do with the weakness of the ice type and the fact that only ice types directly benefit from hail while multiple types benefit from sand, sun and rain, but its really telling that an ideally built hail team seems identical to a monotype ice team. In a meta where Darmanitan, Metagross, Genesect, and Aegislash rule, Hail has no chance. Game Freak is an abject failure at game balancing.
Anyways judging by the previous unbans of

and

I think with dynamax beimg banned its the perfect type to unban

who would only be ok in this meta with access to max ooze. His strength and wallbreaking power really is not as amazing as it was two gens ago, especially considering the fact that hes squishy, restricted to LO, and is invalidated by yeti. He could be really powerful, but ppl said the same thing about Gensect (healthy place in meta) and Deoxys-Defense (literally completely useless)
so I'm excited to hear your opinions on this matter.
Well, I was wrong about Mega Metagross being the main threat. The true threat is
Blastoise. The age of dynamax sweeping is over and Mega Blastoise is the most powerful offensive Pokemon in the tier by a long margin, greater than Darm, Vish, Gross and Kart. I feel like every team will need to have an answer to him. His only flaw is serious 4mss - he often cant fit Water Pulse.
Shit is about to get real, no more games - dynamax is banned, the REAL National Dex begins now. The previous meta - the one where games were decided by the first person to use Aerial Ace - is over. This meta will probably now favor those with actual intrinsic sweeping capabilities as opposed to people with flying coverage and decent speed. Buckle up.