"You endure what you tolerate."
In my opinion, he's old enough to make choices for his own life. He has his beliefs, he has his own opinion. If he chooses to stay and endure, it's on him. We do not input our perspective to his as we all know him as a very smart man. He'll figure it out. We just need to stay back and trust him. (◠‿◕) But still, he deserves more. He deserves better.