for some reason after the bathroom scene where jack grabs u, after i shoot him in the left thigh and fall down the stairs jack doesn't follow me no matter how many bullets i even shoot into the floor, I've been trying this for like 30 minutes and no matter what i do he just doesn't jump down unless i literally wait for him upstairs

It's the new patch (Steam/New Gen Console), he wont fall down he walks around upstairs. The OOB acts differently because of this. There are some guides i can point you to or you can watch some of my runs or runs in the CutScene Skip category

ah i see, thanks