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.

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.