You describe one possible situation, let me imagine a different one. I say that I like going by Mike, and you keep making a point of always referring to me as M

You describe one possible situation, let me imagine a different one. I say that I like going by Mike, and you keep making a point of always referring to me as Michael even when it doesn't really make sense to go full formal. After multiple months of it, I kinda get tired of this and decide to accept offer from another company and tell our boss that. When they ask me why I want to leave I'll be sure to mention that, and maybe they'll evaluate our productivity and decide it's better for business to just fire you instead. See how different those two situations are even thought the premise is the same?