Pretty much all main Thresh would be 4 divisions lower if he never existed

CertainlyT champions are allowed to have 1-2 extra mechanics/passives. Don't ask questions.

Yes yes, but he's not free elo, it's not like he wins by pressing one a button or avoiding any interaction with his opponent. You at least gotta make plays with Thresh and that is why Riot despite him being overloaded doesn't nerf him any further, just like Lee Sin.

Now certain wind mage presses one button, casually two in laning phase and his ADC is winning trades left and right.