Well the problem with tera in singles is that the ways to restrict it are not good enough or just stupid, and the problems with it won't go away unless we ban it, as this is a mechanic that lets anything bullshit past its checks. Tera is something pushing potentially reasonable pokemon like Gouging Fire, Gambit, Volc, and a few others into broken territory, and when they get banned more pokemon become broken. Gouging fire is a similar case to Gambit and Volc when you think about it in that way. I wanted gouging fire to be okay, but truth is in a tera meta it just never will be. Sure, gen 9 has powercreep but tera is just as big of a problem as it inflates the power of OU too much.
I said I support a full ban because I'm tired of this sunk cost fallacy bs and I want action since I was pro restriction until I realized there was no good way to restrict tera unless it gets yeeted. The tier is definitely better without tera, and I support its ban as a meta reset feels very necessary right now as it feels like nothing good is gonna come of it unless we get tera out of here. The harsh truth is that you just cannot balance singles around tera, because of the variance and unpredictability, as well as general cheese it enables which bans will never solve unless the mechanic goes. I do understand why people want to keep it, but I honestly think that players should just go play doubles if they wanna enjoy tera in a place where it is balanced, since the variance and unpredictability has strong counterplay in redirection moves and tera having some opportunity cost in doubles. I fear that we will see a massive domino effect of bans due to tera and we won't do anything about tera until it is too late. I think a tera blast ban only solves half the problems, and just feels like beating around the bush of the actual issues
It's already been discussed to death that tera preview just doesn't work in a singles context in the tera tiering discussion. I'm not even gonna explain because many other people have already