Fuck it, I might as well vent.
1. Usopp
He was my third favorite character prior to the timeskip. Water 7 and his development through Sogeking truly made him shine in my eyes. He was also inventive and a real problem solver. Now he's just a flanderized cowardly stereotype of what he used to be and his new plant abilities are boring and as useless as he's become. Also guy gets observation haki once and never uses it again in what was arguably one of the worst attacks he ever used to knock out a villain. Here we are now in Elbaf and so far this ain't looking to be his arc despite that this was a key part of achieving his dream, and makes me fear that LOda is just gonna have everyone achieve their dreams at the same time in the penultimate or final chapters.
2. Chopper
He went from being a small fry genius that was both adorable and intimidating when he wanted to be and regularly made good use of his doctoring skills, rarely ever being able to come across a medical problem he couldn't solve. His transformations were also fantastic, with Arm Point, Horn Point, Jump Point and Monster Point all showing his versatility and what an imposing monster he could be when he wanted to. Now he's just the cute toy mascot who sits in the background and acts as a permanent part of the 'weakling trio', never getting any proper fights that don't make use of that awful Kung Fu plushy point. LOda even had to offscreen his attempts to cure SMILE's affects or have Law and Vegapunk detox and cure the Punk Hazard kids despite that his dream is to cure everything.
Aside from them, every Straw Hat has gone through varying degrees of flanderization and just feel like background sets most of the time. Luffy's increasing range of abilities are also slowly making each of them useless, especially with how more and more bonus characters keep showing up to waste panel time and draw attention away from them, especially Jinbei. The same holds true for Vice Admirals, especially Smoker and Tashigi (Hina? There was never such a person).
Luffy's character has also hit rock bottom, but the rot was already sort of there since Amazon Lily made him even more one dimensional since he no longer had his crew around to bring out the best in his character, a trait which wasn't cemented until the timeskip happened since there were still solid emotional moments from him during Impel Down and Marineford, instead of this soulless condom with only one single emotion and no agency since he's just Joyboy's puppet.
Sometimes I think the only thing still keeping me attached to this series is Blackbeard and Koby and my desire to see if LOda can really pull off a good ending, but considering how he mishandled Vegapunk and Egghead (and Big Meme too), a character and arc that had been teased as far back as Thriller Bark and old SBS, I'm starting to doubt that a lot.