You can make it into a Men Suck kind of site with ex boyfriends who suck or you could go the other way and make it into dating tips for self proclaimed losers. I say this because it is a cute little domain and you could really market it properly (Join the Mr. 0 Network or something like that) and really build up that brand.
But the one thing that end users want is positive things ... you throw up an ex boyfriend kind of list and you always run into the risk of potential lawsuits, etc.
I would instead go with the positive side of things and like I said previously, offer tips on how to meet women, be a better boyfiend, etc.