Wowie. I’m somewhat familiar with this behavior.
My ex bought my sons an X-Box as soon as he moved out thinking my kids would want to visit him more frequently. That never happened. But Disney Dad allowed my 15 year old son to have parties at his apartment when he was out of the country, knowing that there would be alcohol there.
Long story, but at mediation, he pointed at me saying that “she called the cops on our son.” Yep. I did. I went to that party and the one kid who was accused of assaulting his gf, wouldn’t leave. Yeah I did call the cops. The mediator responded to my ex with, “Pamela did the right thing. She’s the responsible parent; you’re not!”
When he came back from out of the country, my son moved in with daddy dearest and never came home. That was devastating and broke my heart. My son is now two weeks from 26, and still is an emotionally a teenager.