What am I doing wrong? How to make Speed Cripple persist after quick save quick load?
Do I need to restart the game and try again every time with this partial speed cripple?

video

It's common to get "fake speedcripple" the only thing you can do is just retry it. In some runs you'll notice people load their quicksave again to double check they have it which means they can easily retry if not.

got it, thanks for explanation!