Why did my ex situationship cried and wouldn’t look me in the eyes when I told him how he was hurting me?

I told him I couldn’t keep playing games and I overheard he was talking about me to EVERYONE CONSTANTLY both positive and negative. I told him I couldn’t do this anymore and he just started crying and ran back inside but now it’s been over a year and he tried contacting me through other people
Why did my ex situationship cried and wouldn’t look me in the eyes when I told him how he was hurting me?
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