Try not to compare yourself to younger girls. All you can ever be is you...doing the best you can try to do. I don’t think that all guys are shallow enough to just be looking for young attractive girls. You said you didn’t go out much in your 20’s. Are you open to going out and meeting new people now? I know it’s hard, especially with anxiety and depression. Keep looking for a good therapist, there has to be one out there that could help. I send hugs and wish you luck.