Luffy.
I used to like Luffy a lot. Before he became a cocky cunt during battles.
That dumbass smirk ruined the character for me.
He was supposed to be a carefree idiot with good battle instinct, not some spoiled brat with an attitude.
I believe the turning point was when Luffy set himself goals beyond becoming PK. When he made plans to take down Kaido.
Normally Luffy would just go with the flow and stumble into adventures. It could have been done the same way here.
Instead he get a Luffy, that usually never cared for anyonre unless they directly got in his or his friends way (was even willing to let Arlong molest kids until Nami explicitely asked him to help), actively choosing a target... Talk about out of character.
Him acting utterly oblivious to the constant savior of the world stuff is not helping either.
Nika mentioned 500 times in his vicinity: no reaction
Some giant says it and Oda figured that its getting weird by now: "oh that guy has nothing to do with me, shucks"
idk why Oda wants to pretend like Luffy is not acting like the chosen golden boy that he apparently is.