As Fynn points out, the Diablo stuff is pretty bad. Horses die very easily for example. I can't stand FF8's mechanics, there's a scene in Deling City where you're so supposed to climb something and it genuinely takes fricking ages to get past it.

Stuff like fighting Sin's fin in 10 or the Jecht shot, in fact fricking Blitzball in general. Did you also know that one can get permanently stuck in Djose and Kilika temples if you dare to put the wrong sphere in a slot?

10-2 is less annoying but sphere break and the whole notes thing at the end makes you wanna throw the game out the window.