I had made an account just to post it! It's warming as hell to know it could help give you a workable verbal framework.
This way of thinking isn't (yet?) /always/ something I'm able to just root myself in, down to the autonomic depths of my lizard-brain or whatever, and I definitely still slip into moments or swathes of variations on, "I am in some way fundamentally wrong/insufficient".
So, sure, it's not a panacea that lets you evade depressive troughs completely, BUT it lets you go through those with a supervisory lens that says, "was that thought/attitude/self-perception unambiguously extra-moral? no? then it's not real; it's just a shame narrative; carry on". That's MORE than enough for a shit-ton of cumulative and lasting progress.