People fail to overcome social anxiety because they don't stick with it. Cognitive therapy is not hard, but it takes daily, consistent learning and reinforcement to become rational. Research indications are that you learn new habits in two months if you systematically work on doing them each day. Keep a journal and keep working on your anti-anxiety therapy.
https://www.socialanxietyinstitute.org/blog/cognitive-behavioral-therapy-social-anxiety-makes-physical-changes-brain