Chi-Chi from Super. In Z, despite the fact she annoyed quite a few times, as I've matured, Chi-Chi was actually kind of understandable (well, at least when she doesn't put study in her priority list over Earth's safety), and in Boo arc she has mellowed out anyways thanks to Character Development. Then came Super, though she doesn't do it often, so it's okay.
Pan from GT. Oh god. If Chi-Chi's behavior was kind of understandable (she wants to be a responsible parent), this kid is so bratty that it pissed me off. I've actually mentally begged Goku to bitchslap her for the sheer amount of disrespect he got from her.
Bulma on Namek arc. At least in part 1, she was actually very useful. The same can't be said on Namek. All she did was whine, whine and whine.
Goku from Super. Enough said.
Muten Roshi from 89. God no, Toei. Muten Roshi might be a pervert, but he is not a sexual offender. The worst part is that it was all played for laughs while Yurin was yelling for helps. I was...not okay with it to say the least.
Gohan from RoF. Thankfully, he got better.
Chaozu. Seriously, why is he even here ?
Frost. A Freeza-wannabe ? No thanks.
Future Zamasu from Toei. I like the character in general, but his rants were pretty annoying.
Beerus from BoG arc. This guy was such a dick. He got better, thankfully.
Gotenks is about as bad as GT Pan, if not worse. At least, Pan's stupidity didn't got most of the cast killed.
Majin Boo from Super. Acts like a jerkass to Mister Satan and causes the conflict in BoG, sleeps in RoF while everyone else is getting beat up, fails the written test so he doesn't fight, and finally fights in the Exhibition match...only to sleep again and miss the actual tournament...seriously, why is he even here ?
Broly/Bio-Broly. On one hand, a huge guy always screaming Kakarotto. On the other hand, a weaker and uglier clone from a character that I already dislike. Great !
I'm done here.