Shonen overall, with some exceptions, became a total failure as genre.
The reason why I'm saying this is because another manga just ended, and the ending was just bad. I'm talking about MHA with it's awful ending, where MC stayed as side kick, and Urahara didn't became anything special too. This is another shonen failure, which became right now rather a rule, that just saying no matter what story is about it's ending will be dumb. Why I'm calling this as new rule? Well, we can count all long series that got bad ending: Fairy Tail, Reborn, Naruto, Bleach, MHA, Promised Neverland, Seven Deadly Sins and AOT.
Ofcourse there was few shonens that have decent ending, but they usually was w ritten by female mangaka, such as: Fullmetal alchemist, Pandora Hearts.
Also there was some exceptions, such as Kimetsu no Yaiba, Soul Eater, Fire Force, YuYuhakusho and Rave Master, but it didn't change the fact that shonens usually fails to deliver decent ending.
Also there are few shonens that are still ongoing, such as Black Clover and One Piece, but BC almost granted will fail expectations, while One Piece is failure already because it takes more then 1000 chapters and still is far away from ending.