As person with a similarly vicious voice, part of the answer lies in cognitive behavioral therapy techniques - information is the enemy of hyper-criticism (usually, anyway).
The voice of your own critical judgment can be vicious, but if you're on board with that you're not, nor are you somehow supposed to be, some kind of rational Messiah with all the perfections and answers, but rather regular person doing their best, subject to the usual problems and issues that beset humans all the time, it's much easier to remind the voice, almost as if going one voice deeper - giving the hyper critical voice it's OWN voice - that it's being harsh to a standard that virtually no one has ever or will ever meet, that there are reason you or other did things the way they did (even if those reasons include "we didn't have time to research any other way, and the resources that would've made it possible or trivial like it feels now came about after we finished this.").
Anyway - basic idea here is to give you voice a voice and whip back around and overflow into the regular critical space where criticism can be healthy instead of incessant and damaging. I hope it works for you! It works fairly well for me, but I'll admit freely that sometimes I do feel like such a massive twat that BOTH voice roll their eyes at me. XD
The voice of your own critical judgment can be vicious, but if you're on board with that you're not, nor are you somehow supposed to be, some kind of rational Messiah with all the perfections and answers, but rather regular person doing their best, subject to the usual problems and issues that beset humans all the time, it's much easier to remind the voice, almost as if going one voice deeper - giving the hyper critical voice it's OWN voice - that it's being harsh to a standard that virtually no one has ever or will ever meet, that there are reason you or other did things the way they did (even if those reasons include "we didn't have time to research any other way, and the resources that would've made it possible or trivial like it feels now came about after we finished this.").
Anyway - basic idea here is to give you voice a voice and whip back around and overflow into the regular critical space where criticism can be healthy instead of incessant and damaging. I hope it works for you! It works fairly well for me, but I'll admit freely that sometimes I do feel like such a massive twat that BOTH voice roll their eyes at me. XD