I've been trying to keep away from making serious public comments on the teams I see, but after checking this thread and seeing submissions from 2 tier leaders, I couldn't bring myself not to leave this post here. Since this is the DOU teambuilding competition, I feel like there's no better place for me to express my opinion on some teambuilding issues I've been noticing. Feel free to move or even delete this post if that's what you believe is correct.
I'll try to make them sound as much as suggestions as possible, but I think it's time people understand what I mean when I joke around about "ground resists". I really hope my message, after over a whole year, is finally understood on yet another attempt. I'll go by order of submission.
Tree's team is first. I wonder if anyone else noticed the lack of a ground resist there. You can obvioulsy go ahead and ignore the existence of speed control by saying that there are multiple Blizzard users to pressure Lando and Zygarde, but the funniest part to me is how hard Camerupt goes in. Picks up KO's on Volcanion, Scizor and Ninetales, while also threatening 2HKO's on everything else. Gastrodon is another Ground type the team absolutely hates, as nothing really pressures it at all while it can KO Volcanion and possibly Zygarde. Volcanion and Fini are other 2 Pokémon this team struggles a lot against. The only water resist on the team is walled by both and nothing OHKO's Fini. Actually, only Zygarde's Z and Darkrai can threaten a 2HKO on Fini, both of which very suboptimal options, while 4 Pokémon are absolutely walled by Volcanion. Koko also seems to be somewhat of an issue, especially if Zygarde is checked, but it's not as huge of a hole as the ones seen before. I'd say your best option to help with so many issues without changing the team too much would be running a Toxic Zapdos over Mew. A weirder option would be Mega-Aero + Ferro over Mew and Scizor. You keep most of their roles while fixing the Gastro and Fini issue. Ferro gives you a better option vs TR, while Aero walls camerupt, sets up twind and rocks and pressures Volcanion. These aren't ideal, but I'm trying to follow the rules and not change your team too much.
n1n1's team seems to struggle a lot vs Rock. 3 weaknesses without a single resist sounds a big alarm, especially given how common Stealth Rocks are. Tapu Fini and Volcanion are also insanely problematic, especially the former. I was thinking of replacing Mew with a Kartana and making Lando rocks with a berry.
Derivatives definitely needs better Fini answers. Honestly, I'm sorry but that team has far too many holes. Using 1 fighting type is already hard, 2 with a dragon is just asking for trouble. I wish I could help.
Amir's is, in my opinion, the best team in the thread. I can see opposing Metagross being really annoying though.
n10sit seems to have forgotten Metagross is a Pokémon and that Ground is a type. Don't forget that you don't have to be Ground to use a Ground move and that speed control exists. Tapu Lele also seems to be a huge issue. I'd reccomend running Iron Head on Sandslash just for this reason, honestly. I'm trying to find ways of fixing the Metagross weakness, but a well protected one will always tear through your build. I could just be wrong, honestly, and Zygarde + Inci under veil could be enough, but it is a fact that your switch ins to a Tectonic Rage are no where to be found. I hope this helps figuring something out.
Egor's biggest issue seems to be Incineroar, it straight up walls 5 Pokémon on the team. Metagross also seems to be an issue. I think Gastrodon over Amoonguss fits perfectly. It resists Rock, which you are insanely weak to, checks both Inci and Metagross while also still providing a water resist. I'd consider Thunderbolt on P2 if you make this change, as it helps vs Fini and you no longer need foul play for Metagross.
Finally, I'd like to say that I know these may not be your most serious teams, but the issues I pointed out here are commonly seen on teams this community uses in actual tournament games. If we want our community to grow, it's important to improve our teambuilding habits. I'm not perfect either, nor are my teams, but I feel like I've had enough experience (and success) in this game to be the one saying we have notorious teambuilding issues and that's clearly shown when, on a teambuilding competition, almost every team shows obvious holes and no one seems to notice them. I hope my post helped you not only improving the teams you've submitted, but also the way you approach teambuilding. Let it be clear that this is just the way I see the game. In my opinion, we all have a lot to learn about this game and I feel like many aren't willing to keep learning, which is one of DOU's biggest issues. Please don't take any of this personally, I'm just trying to help.