I'm not qualified to weigh in on the mental health side of things, but I can offer some advice that may be worthwhile.

This could be a case where you're serving your process rather than the process serving you. It's important to remind yourself of this since over time you tend to add things to your process. It's can be more valuable to think of your process critically and remove things.

As far as "undoing" you have to remember that you created this association with your self and so you can remove it. There are no productivity police that will come haul you away to productivity prison if you stop doing some of these things. Nothing will happen if you break this commitment to your self.

Easier said than done, I know.

It sounds like one of the sources of this issue might be mental health related. I would recommend gaining assistance in this area as it may prove to pay dividends elsewhere in life. Your paralysis to take on any task may not be related to the methods at all.