I answered always. I have self-sabotaged myself out of genuinely good opportunities in life. However, it is never done in conscience. I think that's more of the problem.
I think I'm lucky enough to say that my few romantic encounters in life were not bad experiences. Which men who have shown great interest in me are not inherently bad people. Each had a decent amount of understanding, care, and kindness for others. Due to my anxious-avoidant tendencies (they seem to get worse as I get older), I would slowly yet eventually push away each man, emotionally and physically. I don't know why I do it. Because my self-esteem is so wrecked that I unconsciously feel I don't deserve them? Regardless of that, my guess is that my push-and-pull behavior leaves them to wonder where they stand in life, and well, they can only stick around for so long. I cannot blame them for giving up.
I have self-sabotaged certain friendships too. This has happened twice. Both friendships started with them initiating their interest in me. I enjoyed their presence, humor, and personalities very much. Yet as time went on, I stopped responding to their messages, or at the very least, would take a very long time to respond. Or, I would turn down their invites to hang out. Again I have absolutely no idea why I do this or how to stop.
I can rattle on forever about the more nuanced opportunities for a more fulfilling, emotionally-rich life that I have self-robbed, but I won't.
I guess I have a vague idea about why I self-sabotage—certain childhood experiences, abandonment issues, amongst other reasons and origins. I just can't pinpoint why I can't stop self-sabotaging, and why I have no urge or motivation to keep good people around. It's bizarre.