If you’re not excited about Brighter shores then I really don’t know, for some reason no one else has ever tried to make the same type of game (aside from Genfanad and Titanreach, both of which have shut down quickly after release)
You could check out Project: Gorgon, it’s something of a mix between Runescape’s multitude of slow-to-level, interconnected skills on one character and a more typical MMO with distinct classes, buildcrafting and group content. It has a free demo on Steam. All of that said it’s only vaguely similar, and I wouldn’t mention it if there was anything closer to OSRS.
Your comparison to Satisfactory makes me think you’re approaching the game with a completely wrong mindset. It’s not supposed to be a chill sandbox playground with no difficulty where you rapidly conquer the planet and build cool stuff. It’s intended to be an engaging survival game with a horror aspect of diving into dark depths and hoping that whatever lurks there doesn’t notice you. It’s meant to be atmospheric, with the threat of starvation, predators and later on some story aspects pushing you to explore further and deeper for materials and tech.
I hope you give the game anoher chance at some point because it really is a one of a kind experience. There’s two things you should be aware of: First, in regards to another comment: there’s no events for you to miss, IDK what that person is saying. There’s two big plot points that happen in a playthrough regardless of your presence. Both of them give you a timer well in advance so you can show up to / observe the place when it happens. Everything else, like all the distress signals or abandoned bases? They’re empty from the start of the game, even if you go there immediatelly nothing will change. You aren’t missing out on anything.
Second, don’t feel bad about missing out on upgrades or whatver. The vast majority of them are sidegrades. The important stuff that you need to progress both spawns much more often than the sidegrades, and you will often find it at the distress signal locations.