I do understand your point, except you forgot the evidence of thousands of words in the form of texts, emails, audios, etc that were introduced and explained by the expert as domestic violence. She also explained why she thought that they were. It wasn't a few messages. It was hundreds of interactions over the entire 18 months. She was on the stand for 7 days.
The expert is looking for patterns of behavior that increase in intensity and frequency.
We heard him talking to her on that sex tape 3 weeks before June 4th. Did that sound like someone who was trying to get rid of her, being stalked, trying to get her out of his life? No, it didn't.
Something happened towards the end of May that made him very angry at her and maybe even fear her. But, I still don't know what that is.
IMO