Hey, we haven't ever spoken before, but I just wanted to comment here saying I know how you feel and give you a big hug. Reading this was like reading my own thoughts that keep coming back and rearing their heads every few months just when I think I'm doing OK again hahaha. (And this from someone who actually does relentlessly try to market LOL)
I don't have any solutions unfortunately. Mostly I just feel horrible for a few weeks, a few months, a year, and then I'll randomly get inspiration for something and get some renewed motivation and start something new against all odds because despite it all in the end I get boundless joy when I'm creating even with all the mental health breakdowns LOL I don't really know anything else to do. It's rough hahaha.
So I just wanted you to know that you're not alone and to show my support and hope that with some rest you'll refind what it is you love and get inspiration and want to create again, for yourself, whether that's returning to this, or finding another new outlet to fuel your joy and inspiration into ♡♡♡