I'm the same as you. I once tried getting help in my early 20s by talking to a therapist and I was TERRIFIED of her the first few sessions but gradually I became comfortable around her as I felt forced to interact because I was paying money out of my pocket. Not showing up would mean a loss of money, and I like to save my money and hoard it lol. But anyway, she was a shite therapist and I didn't feel like my voice was getting heard. It didn't feel like she understood me at all and was just going through the motions of her therapist role saying things like " How did you feel?" "that's too bad," "aww.." and short snippets like that.
I think therapy is a joke and people just do it to vent to people. I remember asking her techniques to combat social anxiety and she had ZERO. My boyfriend's therapist was so good, she gave him homework to take home and practice and also some psychology tips and tricks to fool your brain into thinking you're confident and not a socially anxious wreck. It's hard to find a good therapist, I guess. Funny thing is, his therapy didn't help him, I helped him. Maybe therapy is just paid emotional support and friendship for lonely people? I would suggest trying to find friends who understand your anxiety. Maybe join a social anxiety group so you feel connected to people, not judged by a bad therapist.
Personal anecdote/vent, but I am so socially anxious that I can barely interact with my boyfriend's family and they think I'm rude because I'm socially awkward and can't go through the social dance of "thank you" "GOOD TO SEE YOU!" and "tell so and so I said hi" - I just feel so awkward and artificial when I do that. By not saying anything, normies think I am rude and don't want to speak to them kek. I mean, I guess I DON'T want to speak them because of my social anxiety, so..