I recently was working with a quantum startup where the founder was so jealous of me he came up with a new lie about his history and accomplishments multiple times a day. It was endless, and nearly nothing he said had any basis in reality. I totally gave up on him when his lies became so audacious he got mad at me twice for casually dismissing his claims of being the real Satoshi and that Rigetti totally stole his id…
Sometimes the best thing to do in that kind of a situation is to let the person "win" the conversation every so often.
I went along with everything until I discovered nearly his entire code base was copied from other people's git repos and the one thing that seemed to have a little genuine code wasn't capable of meeting his claims. Then he pretended it as "obfuscated" and as a hacker, I should see through it. The problem is,I totally saw through it.
Maybe he was hoping I'd turn his imaginations into real things. I really couldn't tell.
His behaviour was so bizarre, I was concerned he could explode spectacularly. Not worth the time and effort to calm his jealousy and internal rage.