I haven’t played RCT so not sure how I compares.

But Factorio is first of, a sandbox game. You can build however you want in your own tempo. Not sure what you mean by finicky?

But I don’t think it’s tedious micromanagement at all. it feels super good when you build something new and it works. And there is so many technologies and it’s jus fun exploring how everything works together and coming up with new designs!

There is also enemies, but can be turned off if you just want to focus on building a Factory. I mostly play with them, building up defences and killboxes and making automated train supply that comes with ammo, wall, etc.

It has a demo you can try out. It’s scenarios so you try out different base mechanics in the game. But the actual game is a sandbox game.