Why do women need a challenge in looking for a potential mate?

I constantly hear women talking about men. issues with men, he cheated he lied, all men are dogs etc. I'm consider myself a pretty nice guy. I adore women, i treat them with respect and as equals. These are qualities I'm quite sure that most women would want from a man but what confuses me is when a man is courting a lady, he is all of suddenly, being too nice. A woman that is beautiful and confident can pretty much get any man she wants. What man wouldn't want a beautiful woman. As soon as you treat them like queens they run. Why? On the other end of the field you have women who have been mistreated in ways unimaginable, yet even when THESE women find a good man they still say he's too nice. I understand the psychological damage has been done and she's expecting a man to treat her bad but that's not a valid excuse. Good men like myself are here and we are passed and overlooked by no good men. As soon as a no good man messes her up her perspective on finding a potential good man changes and she says "all men are dogs". I'm sorry but if women thinks a challenge or finding a challenge involves me being no good then she can keep moving cause she won't find that with me. Some women even say that it's a sign of weakness if I'm too nice WHAT?!! I"m not weak clingy or needy. I will never understand a woman's psyche but I'm hoping someone in the Y/A answers community can answer this for me. Why do women need a challenge to find a man?