There were quite a few reports like yours from users running the game with computers that meet the minimum requirements.
Maybe with adding more features and objects, through updates and DLSs, the game gets more and more demanding?
The devs already mentioned they are going to make improvements so more people will be able to play (they are also planning to release on consoles, so there is hope) but we don’t know when.
What you could still try is, is to verify your game files via steam.
I’ve made a short tutorial, it’s → here
