I got all but one achievement in Subnautica, and all of the achievements in Below Zero (the sequel) in my first playthrough of both games, just from taking my time and thoroughly exploring both of the worlds and completing the story without even consciously trying to go for the achievements.
With that said, they are open world games and at times don’t really give you a whole of guidance as to what you need to do next. So you are kind of left to explore and figure it out on your own. If you don’t like that sort of game you might end up hating them by the end too.
For me, it wasn’t just the story, but also just randomly going out and exploring, checking things out, and finding cool (and sometimes scary) things.
It’s one of those games that I’m hoping in like 10 years or something I’ll have forgotten enough of it that if I go play it again it’ll be mostly all new again.