Unfollowed my friend’s boyfriend and now they’re mad?

My friend’s boyfriend and I have a past. We used to hook up before they went out and he was horrible to me. He is still rude to me now. After I left school I unfollowed him on insta because I don’t like him as a person along with a bunch of others I don’t fw. Now they’re both attacking me and he said I’m “rude and snakey.” Have I been unreasonable?
Unfollowed my friend’s boyfriend and now they’re mad?
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