User blog comment:TheTobarMethod/Why is Mid one-sided?/@comment-99.27.98.237-20130316095430/@comment-78.130.174.166-20130316130424

Katarina isn't weak at all. You pointed out that she's popular which means that a lot of people are playing with her including some noobs. Probably you've never played against a serious Kata that knows how to use her spells not only for farming. Her popularity brings her some weak players who don't know how to play her at the beginning and some of them never learn... And about the "no matter who I played" - Katarina isn't really powerfull in early game. She needs all her spells to make a good damage. That means if she's against a well playing range champ, she is losing at early game except if she plays more def until she has enough health to jump on him and kill him with a single combo (which isn't that hard if her opponent is ranged and haven't killed her before that AND doesn't have a stun).

In my opinion there's nothing like "weakest champion" (that's not only about Kata). There can be only weak summoners! Every champion can be powerful (even Karma) if the summoner knows how to play with it! :)