
I'm going to have to respectfully disagree with you there. It's only the bad members of the family that see themselves that way. I mean for example, the Grandfather is interested in talented people and doesn't care about their class. The family also has it's own little town for workers of the household. It's those reasons why commoners respect the family and were sad to see them destroyed.
Also most of the members work hard for what they have. There family IS legendary and it's important to teach why. All the rules they have in place is there to help combat in true arrogance. You're not guaranteed a position just because you're a member of the family. Honestly the good members of the family have a lot of humility and compassion, its the true snakes of the family you have to worry about.
Tbh, I'm with the aunt's husband (even if he's lowkey a snake). I don't like the family either.
The main reason why some of the members are so intolerably insufferable is because of their unbelievable pride in their surname. Yes, the grandfather is amazing for his accomplishments, and his family being recognised as significant to the the empire is justified, however, sometimes they are treated and see themselves in the story like they're a whole different breed (⌒▽⌒) above literally everyone else.
"A legendary family... blah blah blah", growing up in that environment, you're bound to be vain, unsympathetic asses like the uncles and cousins. They are too privileged imo. They lack humility.