Mine are that:-
Magnus Chase is not really good.
Percy is really, really overrated.
Poseidon, Hera and Zeus superly suck.
Luke is a hero, who realised his mistakes and changed, hence he is the one who saved the world, not Percy.
Lukabeth is cute, if you ignore the age difference.
Perachel is an awesome ship.(Percabeth is my OTP, don't worry)
Piper hate is spiteful and toxic