Ok so i was finally convinced to play LoL(by my friends). Even though i tried it(like 1 year ago) i don't know many things about the game(like all the heroes and items). So while i was playing i noticed that the damage dealt by heroes is very low?!(for those wondering my main game, arts, moba or whatever, is Dota2) Like i was playing a fizz mid, the enemy got like 15% hp so i thought "hey i'll just use my ulti to kill him" so i used and BAM.......... still alive?! The ulti took like a quarter from what he already had. Is it a bug? Or is the damage that low?(it's an ulti after all the dmg should be higher IMO).
If the dmg is that low(maybe it was the hero underpowered or something) what heroes(or roles) deals huge chunks of dmg in a short time?(preferably once they get their ulti's)