This game is actually alright; the gameplay has flaws but I think people really overblow it. Although there are moments that feel frustrating and sometimes unfair, it's never too much, and I actually feel the uncertainty of aspects of the gameplay work quite well to create a frightening experience. You really could lose at just about any moment. That being said, it's still very simple, so I can't give it too much praise, but I at least prefer it to the bland aggravating reaction-time loop of the second game.
The game is also quite unnerving as a whole, I love Springtrap's renders and every first-time Phantom encounter is terrifying. I do honestly feel the story falters a bit here; the in-between minigames have very little impact on me given most elements were only formally being introduced in the previous game, and due to this game's original finale status those concepts had to try and wrap themselves up immediately, which is not very entertaining.
Also the cake route sucks.