In repeat games your friend's strategy might actually be counterproductive, assuming he's playing against people that are rational enough to figure out that he always starts offering a draw round about the time he expects to lose, but not so good at chess that they sometimes don't sometimes miss opportunities for a quick checkmate...

I'd be disappointed if an AI chess computer invariably let me know that I had a better path to winning the game than it did.

Does that cause an interruption while you are playing?

Do you play on chess.com? That seems to attract unsporting players.

https://www.chess.com/forum/view/general/request-for-disabli...