You know it's coming to an end when the shonen manga you like suddenly lost it's charm
Everything suddenly get rushed, off paneled, Author seems to confused about which are important and which are not, characters development sidelined, etc etc
And in the end, you also realized that it's just another one of the "chosen one" type storytelling
Same shit happened with Naruto, we just have to deal with it
If you still have hope, stay
If you can't deal with it, leave
Those are always the only option you got