Maybe it was because I played the Steam version but SA2 was just extremely jank. Constantly falling off due to the buggiest movement. That and the lack of an open world and fewer playable characters (and the Knuckles missions can go kill themselves)
In the second game, you were forced to find each emerald in order for no reason. It could have been fine if they had kept it the same as the first, but they made it tedious instead.