Hi @KUUPID and happy new year!
I'm sorry to hear you're going through this. I've definitely been there (more than once) and it's not a fun place (though I'm also confident you'll get out of there. But it's hard when it happens).
I'd be happy to review the chapters you released and let you know what I think. Would you rather I send you my thoughts (once I have them) through a PM or post them here? Also, would you like a detailed, or more general review?
As for tips, I'm actually thinking about writing a little something about it soon (based, again, on my own experience with writer's block and lack of confidence, and what helped me with them). Until I get my thoughts organized and written though, which might take a few days (stay tuned, I guess haha), I'd say remember that it's a slump that'll pass, give yourself permission to write "bad", try to differentiate between days you truly need a break on and those you can convince yourself to do some writing on and most importantly have compassion for yourself. You'll get out of it.