Yes, we know you're aware of the travesty that is Shaq-Fu, so instead of delving into how bad the game is, let's talk about why it was bad.
Because on the face of it, there's no reason Shaq-Fu had to fail. It simply had to be a passable Street Fighter clone with a Shaq sprite pasted in, and it would have been thoroughly mediocre, lost to time along with Michael Jordan: Chaos in the Windy City and Bill Laimbeer's Combat Basketball.
Unfortunately, the developers neglected the most important thing in a fighting game: the fighting itself. The game is sluggish, and closing the distance between characters is a chore. This, compounded with the fact that the AI is all too happy to sit in the corner and toss fireballs at you. makes for a very frustrating experience. In addition, combos, special moves, and finishers are incredibly difficult to perform, and even when you do, they're not satisfying.
The game doesn't feel good to play-- it feels like work. But hey, don't take it from me, you can play the game for free right here courtesy of The Internet Archive. See for yourself.
The only saving grace here is that Shaq is currently developing a follow-up to the game in an attempt to redeem himself, and he's apparently getting a lot more involved this time. Only time will tell whether or not putting more Shaq in Shaq-Fu will fix the problems the original game had.