What's something(s) that your ex did that made you feel small

Let's flip the script:

A lot of people on here talk about how their "amazing one of a kind love of their life ex" has left them.

What's something they did that absolutely sucked???

I'll start:
Mine had insane mood swings.
pretended she didn't know me while we were out at the grocery store (walked ahead of me like 10 feet)
Would make jabby comments to neg me and put me down "It's a joke".
Terrible at resolving any conflcit or taking accountability.