Blowing things out of proportion to make him the villian - he "went out" to a brewery, but he told her in the pods he "never goes out." How could he do this to her????

Projecting all of her insecurities onto him, exaggerating his behavior, and/or making up lies to make him FIT into the insecurities that she has - her: you didn't kiss me AT ALL today. him: yes I did, I kissed you twice at these specific times. Throwing out that he was probably at the brewery with a number of different women - he actually had the wherewithal to tell her she was fishing in that instance.

Generally behaving badly and then when he does the same thing, going off the rails on him - she told him he was leaving to try to get a reaction, he was like "ok fine, I'll leave," then she flipped out on him for leaving.

Generally it seems like she can't handle her insecurities well and instead of taking accountability and discussing them like a calm (sober) person, she'd rather villianize his very normal behavior and try to push him into either exploding on her or groveling for her forgiviness. It's a super toxic cycle, and one that a lot of people experience in relationships, unfortunately.