My history with One Piece is a little complicated. I too, started with the 4kids dub, and since I grew up as a young anime fan in the states in the 2000s, saw a lot of 4kids dubbed shows. I loved that dub then, but it's so far and beyond just butchering the story that I wouldn't even begin to know where to start without just dropping major spoilers. In general I can say that One Piece definitely leans more into the "middle teen" age range of what you could expect from a Shonen series and required even more censorship than Yu-Gi-Oh! did, if that tells you anything.
I didn't really watch or read One Piece for years after the 4kids dub was airing, though. Not out of a lack of interest necessarily, but I did spend a lot of time trying to find and finish other series I was more interested in like Bobobo, Yu-Gi-Oh!, Zatch Bell, etc. Around the time I had started Bleach (my simultaneous favorite and least favorite of the big 3 from the 2000s, curse you and your mixed quality writing, Kubo), Toonami had come back and started airing the fourth saga of One Piece (which I would also say is probably one of the two parts of One Piece I would understand someone saying is their favorite part of the first half), and decided to try to get back into it by jumping on there. It was great, but I eventually hit some filler that made me want a break and I didn't get back to it for years again.
Around 2023, I saw that One Piece went from being the "somewhat niche but still really popular with anime fans" series to the "this is pretty much the biggest thing in the world right now" series, and knew that I would be risking more spoilers than I was comfortable with if I ended up waiting longer to get caught up, so I just decided to binge read the whole thing over time when I had downtime at work, which, working at a non-chain local convenience store that's open seasonally, there tends to be a lot of. I'm still not caught up in the anime though, but I'm technically kinda working on that. I knew that One Piece would be something
@Nidoking would love (he really likes water, the ocean, naval things, pirates, etc.) but he was put off by the art style and just not knowing much about it for a long time. I got him to try it though, and every now and again he,
@King Koopa and I watch it together, and they're about to start Dressrosa soon (tied for my personal favorite part of the story so far.) So, technically I've been a longtime One Piece fan in a sense, but really only actively and with it being any major part of my life in the last few years.
If you do decide to give it the chance, there's an arc before that 100 chapter goalpost I mentioned called Arlong Park that I think is the closest to how good One Piece gets later on in the story. That in particular would probably be the first point of potential failure if you were to try it out, because if that's not something you're into, then later One Piece probably wouldn't be either. I would say the final deciding area for if you really, really have any chance of being in or not would be around Chapter 441. I know that both of those chapter numbers are far longer than entire other manga series, but I'd say if by those points you were either turned off from the series or just not really into it, it'd be fair to stop at those points.