He's bad only in the sense that he's a Draven one trick, with a one track mind and a single play style. Tyler knows his play style is stupid, he also knows the way he plays is feast or famine. Bad players DON'T understand this concept, he isn't bad, he's just cocky, he knows it and he refuses to change the way that he plays.
I can't call him a bad player if he's made it to challenger, because that in and of itself, playing the way Tyler does, is an accomplishment. That's what Tyler use to do, but you're not factoring in the other side of the story. Games were thrown before they even started in some instances where Tyler was "running it down mid". There's 2 sides to every story, and the key word here is "would". He's highly reformed now, albeit, still perma-banned on sight.