Lifts are Stalling and I Don't Know What Routine to Do Anymore

Do 5’s progression (this is a 5/3/1 thing), and you could do an AMRAP set after that but stop when technique breaks down. Add a couple sets of some sort of tricep exercise, I would drop box jumps and leg extensions for leg press or hack squats. If you are going to do box jumps you should do them at the beginning of the workout or you won’t get anything out of them, and it’s questionable whether they actually transfer to squats and deadlifts anyway.