The character doesn't SUCK, just looks a bit weird, if you know what I mean. It's more of a nitpick, tbh.
The jump doesn't feel floaty enough, which means the characters feels like it's just going up rather than actually jumping, and the falling is too quick. There should be balance between floatiness and how far you can jump. The character also jumps too little, sometimes I'm unable to reach certain platformes.