Simple State Machine not working as expected

I assume by bouncing you mean the fact that you can push the button just for a moment, but several '0' signals are sent, instead of just one. Yes, I knew and explained that... This is why if I only used a toggle, the circuit would never work as intended. The state machine I made is my way of filtering off that bouncing, it is my 'debouncing logic'. Why doesn't it work? Could you explain to me how would you do it instead?