“Girls date jerks” is uttered by bitter single men who think that every guy more fortunate than him is a jerk.
“Nice guys finish last” is a phrase filled with double standards. Guys who utter this are not concerned that EVERY girl will value a guy’s superficial qualities over his “niceness”, but just the girls THEY find attractive. It is used to guilt-trip girls into pitying men they genuinely aren’t attracted to. Don’t fall for it.
(And in the event that a girl does fall for emotionally-abusive men, I don’t understand why a guy would lament losing her. She is attracted to unhealthy relationships. Do they like unhealthy relationships?? I don’t get it.)