How the Hell do you stop

I continue to see these guys that have surpassed months or years of not masturbating, and I wonder how the hell did you do it. I had a porn addiction, and I've taken every measure against it, porn blockers, specific routines to not put myself in a situation where the "urge" comes, and the most I've done is 5 days in months of trying. It always happens when I'm either seated or laying down? Am I not supposed to ever lie down or be seated? Then how can I do things like homework, rest, or play video games?

And besides, masturbating is a natural thing, and yet when I do it, I feel horrible, I hate myself, I fall into despair. I'm a Christian, so it's strictly forbidden to watch porn or masturbate, and I'm trying my hardest, but I just can't. I will admit I've made massive progress, going from doing it like 4 times a day to doing it once every two days, but I want to stop completely, and after long periods of time ( like those 5 days), it just hurts.

How did y'all manage to stop once and for all?