So, let me get this straight.
The only reason why Percy is currently doing three more quests for the gods, while already being burnt out from finishing high school, is because he wants to enter the university of New Rome. A place where the monster who he watched kill his mom when he was twelve, the monster, who wore the necklaces of his dead friends around its axe as spoils of war, the monster he canonically still has nightmares about, lives peacefully alongside him and gets offended when he gets called a monster.
He does not want to go to that university, because he has a passion for a specific subject, or because he has a good time and flourishes in an academic environment. We know that Rick Riordan didn't really bother to think about what Percy wants to study, and as already stated, he is already burnt out from academics. But he wants to go there solely because his girlfriend and maybe some of his other friends live there.
All the while, he could technically go to a different university altogether, because, appearantly, monsters stop bothering demigods once they reach a certain age, which completely robs New Rome of the initial appeal it had to Percy in Son of Neptune, and of the sole reason why he wanted to live there in the first place.
On top of that, his trauma gets completely ignored, his accomplishments don't matter at all, and his relationship to other characters get either ignored/ brushed to the side, like in the case of Clarisse, Hazel, Frank, Rachel, Thalia etc. or get washed down so much that they are unrecognizable, frankly completely one dimensional, and require a bunch of mischaracterization, like in the case of Annabeth, Grover or Nico.
I can't believe I say this, because i love Percy, and because I desperately want him to live a fullfilled and happy life, but at this point, I really wish he would have died while closing the doors of death in Tartarus.