I'm fine with a flat, simplistic map. I've played Dwarf Fortress for weeks on end. Rimworld just looks wrong and bad. I'm not even sure how to describe why it looks wrong to me. I've played plenty of cartoonish games and enjoyed them but something about Rimworld... "triggers" me.
I am that way with Oxygen Not Included.
Granted the graphics of Rimworld did stop me from getting the game earlier, since I mostly just glanced over it.