And I hate it when men complain about how they cant girls even though they are a 'nice guy'....

You'll note the use of scare quotes around "Nice Guy", yeah? That's not by accident. Look up "Nice Guy" on Urban Dictionary if you want some of the harsher interpretations of the term.

Being as gentle as possible, "nice guys" are generally insecure and/or socially awkward people who engage in courtship behavior, fail, and feel aggrieved that they were dismissed despite "being so nice"...mistaking their own courtship behaviors for innate kindness. If this becomes a pattern, they'll usually end up with enormous chips on their shoulder that they're completely oblivious to, continuing to think of themselves as "nice" when their behavior often reads as entitled, desperate or passive aggressively hostile. That hostility will be directed either at the women who don't show interest in them, or the guys said women do show interest in, although it's most likely a manifestation of outwardly directed self-hatred.