Doctor Who RPG, FGU’s Chivalry & Sorcery and Space Opera
It was really hard to narrow this one down, so I didn’t. Each of these is a game where I feel like you do a lot of math for no discernable benefit. Doctor Who is the worst culprit; as far as I can tell, in chargen you do a huge amount of derived number-crunching that’s basically: spend points to spend points so you can spend points on whether you are a) GOOD or b) BAD at a couple skills. C&S likewise would require massive sliding-scale-as-you-went math just to determine whether, e.g., your magic-user started the game with a wand. And, of course, the trigonometry (literally) you needed to do spaceships in SO.