Crazy Ex Trope
As this lady points out, the crazy ex scenario was designed so that males may clear themselves of wrongdoing in a relationship. Listen, it’s not always one person who’s in the right and one who’s in the wrong; it takes two to tango.
It’s not only juvenile, but it may also be hurtful to the other person to protest your guilt in any wrongdoing. Instead of trying to find blame, sit down with yourself and admit whether she was crazy or if you were making her that way.