Manmade Rules and Brainwashing

I have been Muslim almost 50 years. I lived with conflict confusion and frustration, due to all the man made rules and different interpretations of verses in the Quran. When asked by my non Muslim friends about Islamic / Muslim stereotyped ( behavior and traditions ) I had no answer. Example: Muslims kill inocent non Muslims and yell Allahu Akbar ( God is the Greatest ) I had no answer. 

I decided to leave Islam thinking I was in the wrong religion. I could not - my heart bore witness to the message in the Quran and I am convinced that The Quran is not a man made scripture. When I read Quran my heart bears witness to its message and I am convinced it is from God. The problem is,the man made rules and the inovations from all the different cultures and tribes and countries. 

Example: Become Muslim, change your name to Abdullah or Muhammad etc and then dress like an arab and then follow the list of all the things you CANNOT DO.  When asking why noone had any answers they said the scholars said the Hadith said it etc. What is a Hadith anyway? Techincally its HEARSAY. 200 -300 years after the Prophet Muhammad died people said, person A said that person B said that person C said that the Messenger of God said XYZ. 

In my mind, that is not divine relveation thats hearsay and I dont have to beleive or accept it. All of the misrepresentation in Islam and the behavior that gives Muslims a bad name come from these Hadith and these so called scholars and self proclaimed sheiyhks ( wise men ).  Example: Prophet Muhamman marrying a 6 year old and having sex with her at age 9. I dont have to defend that. Its a Hadith its hearsay. I dont beleive it. 

When I found the following two You Tube channels I was convinced that God guided me to them and after watching the videos I am convinced I was brainwashed and my frustration was justified all along. I was following ma made rules, not true Islam.