Sorry to hear about your experience taylo.
Prusiks can be a pain until you find a way that works for you. For the ridgeline, I do the same as rip and leave it not too tight because once the side tie outs are tightened, the RL gets tightened.
For the side tie outs, I tighten them the same way the surgeons I work with tighten knots during arthroscopic surgery. I put the thumb of my left hand through the D ring or grosgrain loop depending on which tarp I have. Then I wrap the line around a couple of fingers of the same hand a couple of times. Once the the line is secured around my fingers, I can then squeeze my thumb and fingers together creating slack on the prusik. I use my other hand to slide the prusik along the line. It sound more complicated than it is. It's like tying your shoe laces. Once you get the motion down, it can be down with out looking or thinking. I can literally do it in few seconds.
This works for me but may not work for others. I have pretty robust fingers and have never had problems working and tightening thin cordage.
Don't let life get in the way of living.