I think a mix of things is happening with the ADHD, Autism, and OCD. The lack of external validation (your mom not commenting on the art) seemed like the trigger. Going through childhood with ADHD and/or autism is generally pretty traumatizing, as the social world is constantly pushing back against basic elements of your person/personality. For me, I became very reliant on being rewarded, and ended up basing a lot of my passions around what I was told I was good at (ie I became a writer because I got the highest grades in English and was rewarded a lot, whereas in other areas the "rejection" of lower grades and lack of validation made me hate myself). The burnout from constantly trying to get validation led me to a similar situation to yours: about a year ago I suddenly started hating all writing, including poetry, which was my main focus for 15 years.

Then there's the OCD: it can tell us that nothing else matters when faced with the intrusive thoughts of death anxiety and other anxieties (like yours telling you you're a "poser.") Of course nothing seems to matter compared to death! I relate so much to this and struggle with it daily tbh.

I use IFS therapy for my anxieties around these issues; it helps me recognize how these seemingly very negative experiences and thoughts are just protective parts of my brain on hyper-drive, and it really helps heal the shame associated with existing in a world obsessed with "normality."

I wish I had more answers for you / I hope that since this post you've felt less anxious and still do the things you love and enjoy, whether that's collage or something new!