I really feel you on this post. This was me, last year.
I had good GRE scores, strong LOR, good match, 8 years of research experience with increasing responsibilities, clinical experience, publications, presentations, etc. Applied to 10, interviewed at 2, waitlisted, rejected. I was devastated. My PI even said "If they don't want someone like you, who DO they want?"
Here's what I did: retook the GRE, took the psych GRE (so I could have more application options), took a volunteer clinical opportunity, and really looked hard at the programs I was applying to. This year, I applied to 10 again, got 7 interviews, received offers from 5, one rejection post-interview and one waitlist. I'm starting in the fall and I'm thrilled.
This process is a crapshoot. Things that SHOULD make sense don't seem to. Perseverance will get you far. Remember, you're a qualified applicant but so are most of the other people applying, too. Sometimes there is something in your application that could be improved (scores, match, interview skills) but sometimes it's also about who else was interviewing that cycle.
Chin up! It happens. It's okay to feel bummed out now. Just remember, you still have a chance next time! <3
