Because ignorance is bliss.
They let a few bad experiences brain wash them into thinking all Yas's are toxic, and that every Yas goes in 1v5 and dies then blames their team.
Same thing with the whole Skill department. Just because they messed up and misplayed and got killed, they instantly think "OP OP OP SKILL LESS CHAMP EZ OMGM NERF THAT CANCER REEEEEEEEEEEEE". So then they can't respect how much time and effort someone put into that champ to learn and master them.
It's sad, but that's how this community is. Logical thinking is a rare trait here. Instead of looking at their own mistakes, they go straight to defending their big ass Egos. Noooo, it couldn't possibly be that i made a mistake, it's just that the champ is OP and EZ! YEAH! that's what it is!
There are a lot of misunderstood champs, that people think are OP, and that any main of that champ is a toxic turd.
etc etc.
Hell, iv'e met more toxic
than i have all of the above i just listed COMBINED. And they usually aren't all that good either lmao.