The majority of Bibles verses that are pointed out today as disturbing or crazy are ones that are taken out of context and have reasonable explanations for them.
Slavery is evil. God did not create it or endorse it. God specified the death penalty for slave trades in the Old Testament, and in the New Testament he clearly said it is a sin. the Bible verses on slavery guide us in how to bring better treatment to people caught in a system that was established by humans.
In the beginning, God created a perfect harmony of man and woman – unique, but equal. After humans rebelled against God in the garden, patriarchal sin developed with various types of abuse of women, including misogyny and polygamy. This is not what God created; it is what humans put in place.
There are many valid ways of interpreting the early chapters of Genesis, which even include the possibility that God used evolution to create. There are mysteries we just don’t know, details the Bible doesn’t give. What we know is that God created everything.
When we examine world religions, we find they do not all point to the same God or to paths that end in the same place. Their major tenets of belief are different and contradict each other. To say they are all the same makes God a liar, who teaches different truths to different people. Either one is right and the rest wrong, or they are all wrong. The claims of Christianity make the most sense and have the backing of historical Scriptures to prove its claims are true.
When God did order violence and death, it was always with extreme patience and plenty of warning to give people the opportunity to repent and turn to him. It was never genocide or ethnic cleansing.