Oh my gosh, Evan. Where to start? Of course there are commonalities. I have felt EXACTLY like you do. Exactly. The reason I did all of this was because I was tired of feeling like that. I hear something compelling in your comments. It's you you feel like there is work to be done. I hear uncertainty about yourself and what you should be doing. I totally get that. Been there a time or a dozen.
Let's be clear about one thing: you do not HAVE to date or be in a relationship. Live for you. But, in the mean time, examine the concerns you brought up. They're all right there. Go to the data: why does the excitement wear off? Is it you? Is it here? What do you think is "wrong" with you that would make a women uninterested? Are they your flaws or hers? When you talk about powerlessness, what do you want power over? There are always so many things to consider.