Sorry you are lonely and your daughter died but, there are a few things in your post that stick out here. I'm going to be blunt but, I don't mean to be cruel. I do feel for your situation.

Everyone in your family is estranged? You're not without fault there. One or two would be different but, when it is everyone else, it's you. You want to find friendships, you need to fix the problems with you that caused this.

You found a group and took a walk in offer and they were in a meeting so, you gave up with that group entirely? That's illogical. The Good Grief people were not busy because you were coming or anything to do with you. You want their help, try again. Writing entire resources off or people off because they couldn't drop everything for you is going to perpetuate your problem.

Your "firing" your pdoc and therapist because grief shouldn't be medicated? These are resources that kept you stable for years and yes, a tragic life event occured and you are going to feel that but writing them off entirely is irrational. This risks making your problems worse.

And maybe you do feel so bad that you don't care, maybe you want things to be worse because of the pain you're in but, you're here looking for support.