To give an alternative viewpoint on the CEO, I doubt he was upset. He probably meant to be teasing you, but he's an immature CEO who doesn't realize the effect

To give an alternative viewpoint on the CEO, I doubt he was upset. He probably meant to be teasing you, but he's an immature CEO who doesn't realize the effect his power has over subordinates. i.e., he was trying to joke around with you like you were his peer, but didn't realize you might interpret it differently given the power dynamics. He's definitely an idiot, but it sounds like he's more guilty of not realizing his position in life than he is of being actively malicious.