No. But might your father issues have anything to do with why you chose to be with him, even when he didn't consider you enough of a girlfriend to share his intimate moments with, instead going off and, as you describe it, fucking pretty much any guy he could find?
It's possible. If your siblings had that sort of lasting contempt for you, there has to be some reason why, and if they think you had something to do with your father leaving, that could certainly do it. For the record, I'm not expressing or implying that you had any fault in your father leaving, but it's certainly possible that your siblings think that way.
Kids look for something different and fixate on that to pick on as a way to build themselves up. You being angry and bitter about him leaving can also affect your mood and behavior, causing more ridicule, scorn, etc., which can send your self-esteem into a tailspin, which causes more problems, and it's a vicious circle. So yes, it's very possible.
Most people don't want to be friends with someone that will being them down.
The theory here is that he affected you, and that effect changed you and led to all the other stuff you describe.
You're not taking the whole causation thing far enough. You say your suicidal thoughts come from your ex-boyfriend and your poor social life. But go another step up the ladder... What led you to make the choices that led to those problems? THAT is where Gato's assertion of father issues comes into play. I happen to think that's a very plausible possibility. If it's not father issues that's one step up the ladder, then I would like to know what it is instead that's one step up the ladder.