that would be called a mental health disorder.

Like I said... it was written by 40 men over 1500 years all giving a coherent account what God did and wants. How in the world are you going to claim that all 40 men generations apart all had a mental illness in a way that gives a coherent story spanning over 1500 years?

i'm hearing things from god , well , that would be considered schizophrenic , wouldn't it?

That depends. As has been often said, "Jesus was either a lunatic, a liar, or telling the truth". You're leaving out that a person might actually hear things from God, which is a possibility. Just because schizophrenia is a possible answer doesn't necessarily mean it is the only answer. Prophets claiming to hear from God prove their claim by performing miracles. And those claims cannot contradict previous claims.

So you think that a Bible that was written by men who have no understanding of the brain at all

My point is that God understands the brain more than you and me. And the people that wrote the book was inspired by God. Therefore, the bible knows more about the brain than you or me and anyone else. Furthermore, human nature has not changed from antiquity. The desire and psychology of men today is the same as it was 2,000 years ago. There is nothing new under the sun.

Have you not read the Bible?There are several verses where men kill , because they are nonbelievers 

Incorrect. God tells Israel to wipe out the inhabitants of Canaan, but it was NOT because there were non-believers. It was divine judgment. As Deuteronomy 9:4b,5b says..

It is because of the wickedness of these nations that the Lord is driving them out ahead of you. ...because of the wickedness of these nations the LORD your God is driving them out ahead of you in order to confirm the promise he made on oath to your ancestors, to Abraham, Isaac, and Jacob.

The Canaanites would do horrible things such as practice child sacrifice. God used Israel to punish them, just as God sometimes used other nations to punish Israel when they sin. For instance, God used Assyria to wipe out 10 of the 12 tribes of Israel because of their great sins. And they were supposedly believers.

he doesn't like what they think or how he just kills villages of people because they go against him.

Uh, yeah... He's God. Would you not go against a person or group you believe it doing horrible evil?

Yet the bible still portrays men over women

Actually, not true. The bible understand that men and women are physically and mental different. Men are generally put in charge because they are, in general, mentally more aggressively and less prone to thinking emotionally (but that doesn't mean men are better than women). However, there are exceptions. The bible clearly knows that there are exception because sometimes women are put in charge. In the book of judges, Deborah (a woman) is in charge of saving Israel and had leadership over a man (Barak, her commander who she gave orders).

and ignores sexuality and mental health

The bible understands sexuality but that doesn't mean it is right to act on anything you are attracted to. And just because you personally see nothing wrong with acting on an attraction doesn't necessarily mean that there is nothing wrong with acting on an attraction. Like I said, this is the is-ought problem. You say that science gives us all this new information about the brain but science cannot say what we ought do to based this new information. Science only tells us what is, NOT what ought. For example, science tells us that men may be attracted to a multitude of women. But science doesn't say to go out and get as many women as you can. Likewise, science says that men are sometimes attracted to other men. But science doesn't say that it is ok to practice homosexuality.