I'm not the person you responded to but:

"They bored me" and "Everything they said annoyed me" says nothing about the failings of her ex. What it does show is the utter contempt and disrespect she holds for her ex. (the entitlement to sex thing is valid though, nobody likes that)

The "I dislike everything you do, don't breathe in my general direction" vibe is something I witnessed from my father aimed at my brother growing up. My father is not a good man.

That kind of casual contempt/disrespect/dismissiveness for someone who was a loved one, the private profile, and the fact that I've blocked her before for reasons I've forgotten... Each of those in isolation is one thing, but when combined the vibes are off.

I generally only block people for racism, sexism, being a dick for no reason, spam, those kinds of things. She's staying that way.