You know what champion sucks?
Whoever just shut me down last game...... Also 
Seriously though, sometimes a champion is over tuned and a problem, but most complaints I hear are about a champ doing what they are designed to do.

and
Are impossible to kill w/ their ults
and
Lock down a whole team for a wombo combo to start
and
Clean up fights w/ resets
and
Are ALL mobile/tricky 100-0 champs that can kill you and prevent you from reacting if they get ahead
and
Have good early pressure and can ruin an entire team pre 10 minutes if the enemy jungle doesn't put out any pressure and lanes don't hug towers like a kid on the first day of preschool hugs their parent
In the right situation or if they do it just a little bit too much better than the others that do their job, it's frustrating as hell. However, that doesn't necessarily mean the champion needs to be made weaker, or even that the champion is a problem. I'm completely shit w/
even when she's strong because I don't put down enough pressure that early to get the game finished before I fall off, and I've played against people who did great early as
and lost mid game because they made every initiation at the wrong time and just played team fights poorly. Sometimes it's just as much about the synergy between how someone plays (or how the champs that game are set up, looking at you 5 man squishy team vs
combo) and the champ kit, as it is about issues with the champ kit. We all know that
can cause problems for auto attack reliant champs in team fights, so when it gets picked, then you take
into the match up and mid game rolls around, please quit complaining that
is OP and realize like the rest of us that in any non terrible match up he's just an R bot mid game.

'ly post bruh! You should post more often.
taking you to 100-0? I am disappointed OP- I hear about that every time I play him.
in the clean up fights category