People with low self esteem often participate in self-destructive behavior and decision making. If a person thinks little of oneself, then it is impossible for them to conceive of deserving better. If they meet a better person, they become jealous perhaps, scared they'll left for someone better, mistrust the sincerity of the person, (think they are being setup)etc. etc. Until a person is healed inside, self destructive is the path, usually.I've lost out to a bastard a few times and seen my mom and two sisters with a seemingly never-ending lineup of them. I've tried to explain it but just can't seem to find the true source of the problem.