Both in terms of the opposition and his mindset.
I mean, he almost didn't make it out of round 2 pools because Raziek actualy took a game off of him. Nothing against Raziek, he's a fantastic Robin, but that's the thing, he's a Robin. The Robin v. Shiek Matchup is just completely awful for Robin and yet Raziek took a game before ZeRo switched to Diddy and bodied him. (or so I hear)
Great performances, but I can't help but feel ZeRo is slipping in his mind and his interest in Smash 4. Dude gets so much hate just because he's the best. I feel bad for him, he's always gone through this crap, whether it was because he was cocky back in the brawl days, his victory at the invitational, or now with his dominance.
People just...don't like ZeRo, for one reason after the next. It's gotta suck being rooted against all of the time. I imagine Dabuz feels similarly, though I don't know that nor do I know either of them personally at all.