GURPS. The "Overcomplicated" part stems from 4channers deciding an optional rule that the majority of people will never actually encounter in a game means you have to do calculus all the time. The actual majority of the game is roll 3 dice, try to get under the number next to your skill plus modifiers.
Afelia
joined 2 years ago
That would be the Hays Code in action. It was the precurssor to the current system and was super restrictive as you've mentioned.
My perspective might be a bit more biased on that first point since I only got into the system in the late 00's.
But I disagree with the second point. I almost exclusively GM for my group, and I'd hardly consider anything I had to do to run the game a "slog". There's about as much prep and rules checking as any other system. Maybe a bit more front loading if you want to make a custom race available, but that didn't take too much more time that doing the same in Pathfinder 1e or DnD 3.5 did.