You are wrong on many levels regarding this. It is not bad writing if Oda has written Luffy is a rapist maniac and a villain who rapes women indiscriminately. But that is not the Liffy Oda writes. It all depends on what kind of story author wants to tell. Here Oda is not writing hentai about Luffy raping Nami. So, your logic doesn't work. Oda is writing a story that has cartoonish vibes with some serious real life issues. That is consistent throughout the series. Now, he messed up few things here and there. Again, that is just he couldn't able to convey it properly and fucked it up very bad like wano ending.
What you are expecting is One piece to run like other seinen mangas which it was not or never have been. It is like asking pizza to taste like fried rice. So there is nothing objective about your posts other than the fact that you want One piece to become entirely different manga.