Why is my ex trying to provoke an argument with me?

So without knowing your situation. I'm guessing your ex had to provoke an argument with you because something on their end did not fall into place as planned, so as a way out. They had to point a finger at you

She claimed her friend who was newly single needed her support.

It eventually became an every weekend thing, then her friend started coming over, every single day. She wouldn't leave. And my ex was letting her invade our life.

What are you struggling with in your life? What would you like to have instead?

Our breakup process started when she started going out drinking, about when our daughter was 2

My ex did this,

My daughter from a previous relationship would come over, my ex would leave that weekend n party the whole weekend away. Coming back Sunday. Leaving me with the three kids.

Trump is going to target known criminals in the country illegally for deportation. The Democrats have vowed to fight him every step of the way. Don't they understand this is one of the issues that cost them the white house, the house and senate?

Eventually the phone calls n texts slowed to a stop. Eventually she stopped coming home. And when she did it was instant anger and yelling.

Fast forward to 2.5 years later. The explosive anger and aggression came back out of no where. Long texts, picking fights, threats, anger, rage, chaos.

Inevitably she had an explosive outrage and demanded I moved out n that it was over.

“Intelligence Evolved Twice on Earth”: This Groundbreaking Discovery Redefines Life Itself and Shakes the Foundations of Evolutionary Science - Rude Baguette

I'm assuming she was trying to flee from accountability in her life, probably got caught doing something from the new boyfriend she suddenly had, so to get out of the spot light, she had to put me in it.