Sure yes gothi isnt invincible, but i vote for shadow tag to be banned, because time to set up calm minds etc take too much time, when u have klefki or blissey against it u just can do nothing, any attempts to kill it will just make the fight much more longer, a little satut and u will have to wait 3 turns for gothi rest, its frustrating, this poké just kills the fun, and requires no skill to play it
Those who say its for beating blissey can use much faster responses to him, u just need a strong sweeper with fight move, instead of wasting lot of time, it takes 15minutes to full calm mind gothi in front of my blissey , then i can kill gothi fast, but if he switch, he can start again when he see another opportunity and then u can go for another 15 min depending on which poké u still have
So, easy kills without much skill, and long time stalling, only gothi users can vote no for this ban, only bad thing is the time they took for farming it, a good shadow tag one is really hard to find