I have found over the years that the vast majority of successful men in any place to some degree have issues of some kind. The reason is that people who are "sane" are often happy and content with the mediocre. Most "normal" people are okay living a "normal" life. A "normal" life includes marry a very average girl, getting a house in the suburbs, and following life to the very script that you were supposed to. A lot of the people that break free from that mold to some degree are strange by the standard of society whether it is a famous musician, famous actor, famous writer, or even successful businesspeople.
Similarly with PUA, it is abnormal by the standard of society. You are to meet your future wife through church, through social circle, or through work. You are not supposed to meet your one night stand or lover through the day because that is not "normal". So often times the very people that push against the standards of society are abnormal and in many cases, do have "issues". It has been the case throughout history.
What I have experienced is that you need to be a little bit crazy in order to be successful in life. Think about "game" for a second. You are voluntarily signing yourself up to be rejected by beautiful women and have your ego bruised and battered worse than Rihana when she dated Chris Brown. Yeah, you'd have to be crazy to sign up for that but it is only the craziest of men who can take those rejections week after week from some of the prettiest women that they are bold enough to approach that see success.
Now granted, some PUAs are genuinely psycho and do not need to be out there. Sasha was a buffoon who set the game community back years by harassing women on the streets. That one Pakistani guy in Scotland that got arrested was an idiot. That being said, there are some PUAs who did pave the way for young men out there to fix their dating lives and break from the mold of society.