1. Repetitive arcs like Zou, Dressrosa, Thriller Bark and Wano (Princess calls for help and luffy helps them for no reason) :
Oops sorry!! Straw hats didn't even fought in Zou, and there were no any princess in thriller bark, infact the straw hats were themselves captured by Moria.

2. Lame and weak villains like Wapol, Kuro and Moria (Only Doffy is good in the series) :
But wait!! How did I forgot Imu, Blackbeard, Shanks, Akainu and others.

3. Childish character designs like of Gecko Moria, the noodle guy from water 7, foxy :
Ahh.. I again forgot character designs of Shanks, Kuzan, Blackbeard, Whitebeard, Boa, Kaido. Mihawk, Enel, Yamato, Marco, Ace, Sabo, Zoro and so many.

4. Animation style :
But isn't it cool that Oda made his own art style, and didn't followed the same repetitive art style.

5. Less killings and fake deathouts :
Isn't the show rated PG-13, also the fake deathouts are there for a reason, it'll be revealed later. Also if you wants to see killings in a show to get engaged then try "Berserk" instead.

6. Lack of character development in characters :
But isn't luffy became more cautios and mature after the time skip, Sanji has the best character development in the whole series, Zoro went from holding a sword to cutting stones and irons like bread, Nami started trusting others after Arlong Park, Robin's betrayal and her comeback in the crew.

7. Pacing issue :
Bro just wait. Wit studio is coming with "The One Piece", why don't you read the manga instead until then?

8. Fans saying "It gets better after 300 episodes and so" :
Well it gets better and better after each and every arc.

At the end, I've got no any reason to hate One Piece. Also tell me about your opinions I'll listen to them, well I'm not like others who'll say others 'Re.t.arded', 'Dumbf*ck', 'Are out of your brain', 'You didn't read the post correctly' and other sh!ts for ones opinions.

Hope y'all are having a good day.