When a guy breaks up with u why is he so horrible to you?

Two years together and breaks up with me without the words just stopped texting me and seeing me.
As much as I begged for him and tried.
9 months gone by now.
I’ve been used by him and made a fool out of all my own fault as I let him.
But why be so nasty and careless to someone like why bother doing it to them if it’s over it’s over.
Always texted me randomly aswell when I went no contact.
When a guy breaks up with u why is he so horrible to you?
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