Damn, that guy is probably broke af. Probably in massive debt and taking his emotional problems out at you while sitting at the poker table. Sad guy with problems.
Next time someone asks you why you didn't bet, you could make up some superstitious reason to put him on even more tilt.
"Why didn't you bet that river"
"Normally I would, but the number 4 has been really bad for me lately."
"That has literally no affect on the outcome of the hand."
"Well, certain numbers feel more dangerous to me"
"Oh my god, you are so ****ing stupid"
"No, I'm not. I trusted my gut instincts. My gut instincts told me that the 4 was bad."
"That is idiot logic, but whatever"
"My animal instincts gave me fear, and fear is an important emotion for survival. It is also helpful at the poker table. I think it is a great tool that I've added to my poker arsenal."
I like two approaches, either pretend to be super clueless about the game or pretend to think you're really good while giving out completely flawed logic.