I would say another mistake is Vegeta jawing off that Gohan didn't finish the fight with Dabura already.
He was getting his fighting sense back and gaining ground. 7 years without training and can still transform to SSJ2, dude was a problem.
No one was checking for Gohan in Majin Buu Saga, breh. Both Vegeta and Goku had already surpassed the power he was putting out back then. Mans let his gains go the wayside for p*ssy and school. His
FATHER left the fate of their world in his hands, and he still couldn't even be assed to train a day in his life.
Gets his ass beat three times over and left on the brink of death. Does he die for his seven year long mistake in the making? Nope. Doesn't even have to reflect on it because he's saved by the magic space gods. Meanwhile Vegeta realized his folly and at least tried to atone for his actions even if it was in vain.
What happens to Gohan? Gets a second chance with a free power up he doesn't even have to train for. Just has to let an old man dance infront of him (

) and he is suddenly the strongest thing ever. So what does he do after gaining his newfound power that allows him to absolutely outclass the monster that
ATE his girlfriend, friends, and crushed his mother?
Plays around with him and never actually finishing him off even though he has more than enough power to and knows that the monster can regenerate like that one supervillain years back that took the life of his father and did a bunch of mental scarring that he still hasn't recovered from? Yeah that one.
Anyway the monster regenerates, absorbs your younger brother and his best friend along with your surrogate father? It's fine though right? That awe-inspiring power you didn't have to work for is still enough right?
Wrong. You probably get the most embarrassing beat down in the entire saga. You're thoroughly trounced and paraded around as the monster, now brimming with confidence and intelligence, constantly reminds you of its superiority. Its fine though, good 'Ole dad just showed up with a full proof plan to beat the monster! You just have to catch a magical earr- oh you dropped it.
It's fine though, the fusion is over! The monster is weak enough for you to set things right? Oh shyt you remember how the monster literally absorbed your brother, his friend, and your surrogate father like an hour ago? Look behind you!
That was the last significant thing you've done or were really a part of. Sure you gave pops energy to kill the monster once and for all, but you weren't there by his side to see it through. You watched the man who caused the death of so many of your friends back when you were a kid, and indirectly caused the death of your girlfriend and mother by fighting with dad, actually help save the world. He caught the earring, and actually helped dad free us.
I know Hercule helped convince the people of earth to give energy, but Vegeta cared more about dad leaving us.... did he really care at all? Was my life really that inconsequential due to the existence of the dragon balls that my own father just said "Whoops?"
Your dad is closer with the man who tried to kill you all those years ago, they're actually the best of buddies at this point. Whenever their backs are against the wall they turn to each other before anyone else to solve problems.
At least the humans have an excuse, no matter how hard they try, they'll never reach the level of your father The only time people ever mention you is about all the wasted potential you have, all the opportunities you missed. Hey at least you became a scholar right? Forgot how to train and now have to watch as others do more to protect your own family than you ever can? Because let's be honest, at this point, you're just one of the gang. Dragon Team go? Z-Fighters?
Oh I have a better name, Everyone Who Isn't Goku or Vegeta.
