If everyone feels fake to you, you can resolve that by putting yourself in situations where you will meet real, genuine people. There are many places where you can do that in the world. Hint: five star hotels in Hawai aren't it.
Go do some charity work. Go spend time helping people who are poorer than you. Go around the world without checking into five star hotels. Go and do what everyone else does. There's no need to give your money away to live a genuine life. Having the money available also makes things possible that wouldn't have been possible otherwise. When you see an opportunity to make a difference, having $5m in the bank allows you to make things happen that would be simply impossible otherwise.
This is probably a controversial view, but I don't think this guy is brave. I think he's just stupid. He's greatly limited his own freedom, and that after having worked like a donkey his whole life to expand it. What a pointless thing to do.