and what where the last 3 about?

No they all follow the stories of the anime (as opposed to building on each other). Pirate Warriors 4 is very much a game in isolation.

so there is no story arc connection with the last 3?

So here’s the thing: The game is dedicated to telling the story, so you will get a crash course on what is going on, but watching the anime is better. If you think you will never get round to watching the show, then sure, I reckon you could enjoy this. Definitely do not have to play the old games, it’s a very accessible title.

https://www.dsogaming.com/pc-performance-analyses/one-piece-pirate-warriors-4-pc-performance-analysis/

so, does that mean someone like me who never watched the show can enjoy this or do i need to play the old games?

The fact that Enel an iconic villan and if i recall correrctly, the first villan that uses kenbunshoku haki and the most proficient in it so far, that basically got defeated because of “plot armor” and still managed to achieve his goal got his entire arc cut and it’s not an playable char despise being one in the older entries of the series it’s a joke.

No 3 calamities, enel, or east blue bosses, what a let down

I’ve been trying to scan youtube for specific PC benchmarks, as the previous game had a very crummy port job.