A man who places women on a pedestal and thinks that because he is nice to a woman is "owed" some form of attention or love. Often clingy. When relationships fails, blames women for not liking "nice guys" instead of realizing his behavior and pedestal-placing is what gets him rejected.

Finish last...
That's why they'll treat you like trash
It's not what they really want to do
BUT
Girls only want bad guys
So Nice Guys may give it their best try to
Treat you the way you want them to

A loser as in niceguys finish last.

They aren't nice they're just really really really desperate if they ever run into a homeless person in need they would simply walk past them .

They usually go after girls who are already in a relationship then complain about how they don't cheat on their boyfriends who are so called jerks by them and not fall for their fake nice guy act or complain about how the girl shouldn't go after the attractive guys like how they go after attractive girls and find that really really unfair

They end up concluding that girls only want to be treated badly when its completely not true.

They ignore the fact there are many many other important traits other than just being nice which are important like being financially stable ,having a healthybody,not drinking or doing drugs, being an interesting person in general, having hobbies other than gaming
,having same similar interests

If the nice guy could just stop trying to emothionally manipulate pathetic girls and try to be a real man by fixing their life up by gaining more hobbies , working out , start being honest , get a good stylist and hair dresser and become finacially stable they could become so happy and satisfied by their fullfiling life and be just satisfied with or without a girl . girls would become mega drawn to a guy like

Commonly referred to as an "average frustrated chump". A man that due to his stubborn kindness to everyone fails to get any respect as he never complains about the treatment he gets from women and thus lacks a backbone. Lacking the principle of discipline his offspring, if any, will grow up to be assholes due to the way the nice guy rewards bad behaivor.

The easiest way to have this paradox of the nice guy / jerk be defeated would be to have women stop acting like nice guys and dump jerks rather than reward bad behaivor with sex.

A guy who doesn't pretend to be your friend just to get in your pants. Doesn't objectify and mistreat the women that he can actually get interested in him thinking once day he'll end up with his hot friend . Gross. Never.

A demographic composed of wonderful, misunderstood people, but only when looking from inside their own heads. In reality, they're a collection of mass shooters and Internet trolls.