I went to therapy. It probably helped. I encourage anyone who think they might need it to try it. Certainly do it if you feel more than a little depressed.

But at the same time. While the therapist certainly had some good advice, maybe the most important input was that therapy probably would not help me with the things I struggled with. The therapist didn't have any "secret ingredient" that would solve everything. The only secret ingredient is self agency. The rest is information that is shared among everyone alive - life experience.

Try stuff out and ask people what they have tried. Try more stuff until you know what works for you.

Strangers on the Internet are a source of advice like any other. Some people on HN probably have experience with the "intellectual loneliness" OP is talking about.

There have been a number of occasions when internet strangers have helped me and I have seen many instances of other being helped as well.