I'm not trying to discount any of your feelings or experiences, I went through this same thing for years until I met my current (and first) gf; for context I was 28 when we started going out.

I hated hearing it when I was in your situation but it's always been true for me, work on yourself and keep yourself open and things will eventually happen. I gave up trying to find a girlfriend when I was 27 after years of striking out irl and on dating apps and decided to focus on myself. I was starting a graduate program and got a cool public art opportunity through my city so I just put all my energy into that which helped me focus less on tinder and my lack of sex (kinda) . One day this girl I worked with dumped her loser boyfriend and after several failed attempts to ask her out (I'm bad at putting things down, she's bad at picking things up) i finally had a date. Four years later and she's begging me for a ring.

Life is tough and even harder when you don't have someone to experience it with. Again, I don't know your situation and I don't want to just be another asshole saying things will get better cause I fucking hate those people when I was sad and lonely, but I genuinely do believe good things come to those who wait. Keep yourself open to new experiences and listen to your gut if it's telling you to take a chance.

Or tell me to stfu, that's cool too I get it and won't be upset.