Why do some guys get annoyed when you realised that they played you all along and get angry because you played them back?

Long story short, I used to have a crush on a guy that I realised later on that he was just playing around with me because he knew about my crush on him. I realised later on that he was having me as a game piece and he just wanted me to stick around as much as possible. When he finally "tried to make a move" I called him out and I founded out some days later that he was shading me to my friends and he was basically blaming me about the whole situation what so ever. Anyways I was wondering why do so guys do that? Is it because he actually was interested and he was expecting something to happen? Or is it because he got embarrassed because I founded out?

Why do some guys get annoyed when you realised that they played you all along and get angry because you played them back?
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