Dr Raichi was saying: I don't understand u13 Vegeta.

Is he angry Kakarotto became a ssj2?
I mean, lets be honest, Vegeta just got the perfect punching bag for training. And he's immortal.
I'd say he's angry because he's both far outclassed and irrelevant and if it wasn't already obvious, it is now. He didn't play a major role in this saga because he was on the stranded planet with the others. But now he understands that even if he had been there, he still wouldn't had been a major player, no matter which side he'd fight against. He would have been outclassed and quickly put aside either way.

After being the Emperor and the most powerful of his universe for decades and used to things being this way, he's back to being a side-bitch that no one cares about, quite strong but not exceptional, and most importantly, not the center of attention, just like he was during Freeza days. And that's very harsh on his fragile ego.

That's the impression I get, anyway.

Squirz was saying: Bra has basically zero reasons to be like this. This manga so far showed that she screws up everytime.

She was a girl who was dealt out the responsibility of protecting a bunch of alien civilizations, not out of the genuine desire to protect but rather an obligation. Combine that with the ideology she was raised with (power = everything) and naturally she's going to grow a resentment towards those she deems the "weak".

Do I blame Vegetto? Well no, not really. Bra being given that responsibility is only logical, otherwise what do you make of her immense amount of power? No one is to blame for the mess that Bra is, the only thing we can easily point the finger at is that aforementioned ideology of power that they hold so dearly, or at least Vegetto does. The Buu saga played a big factor in humanizing these characters, in erasing that idea that power is everything and that family and friends are integral, so when you erase everything that made them learn that lesson in the first place, you're left with U16. That ideology certainly wasn't the only factor that played into her otherwise questionable personality, however it was pretty significant.

Now Bra having evil in her heart certainly isn't anything new. The reason Naurb lacked that visible evil that Majin Bra had was because for the most part he was a good person, he just wasn't pure-hearted. Bra on the other hand has a long history of a lack of mental stability, she does have a logical good side that usually keeps that insane side in check most of the time (except for when she goes berserk, she loses all conscience and common sense), but when you erase that good side, only leave the insane side and multiply it, well, that's when you get Majin Bra.

No, I wouldn't say Bra is evil, but she's certainly not a good person either. I would say the best description for her is that she's just a bad person, period. That said no, I wouldn't disagree with the notion that she has some evil in her heart.