It suffered from the exact same flaw as Bleach, but on steroids. Said flaw being: Starting with wacky characters, decent humor, pleasant art and then turning into powerlevel faggotry at the speed of light.
"I wasn't using all of my power. Taste this."
"Well I wasn't using this either!"
"Well I have mastered in 4 years a supreme ancient technique that takes 30 years to learn"
"Well I just made a huge monster lol"
"I have a dark personality! My face is now half in shadow! I'm totally serious and shit, I cleave the monster in half!"