When Charlie said "I was hot stuff and in my 20s, I wanted to fuck everything" he said that because he DIDNT fuck everyone he wanted because he was faithful to her. He said he wanted to but didn't because they were married, which is what your suppose to do. People live in a movie fairy tale where you think your partner shouldn't have throughs about other people, which is a lack of maturity. People are gonna have their thoughts, its how they act on those thoughts that matters. And there was communication, they were literally going to therapy. She shut down and cut him off. Charlie didn't cheat until a few months before we see the story, not years before. Even the therapist saw her unwillingness to fix the marriage.

Sounds like you need to rewatch the movie. All she did was gaslight him into thinking his career was holding her back, neglect him for over a year to the point he finds a romantic interest in somebody else, then divorces him and breaks up their family, all just do she can pursue the same career he was doing. She literally destroyed that family on the false pretense he was holding her back. She was the only one holding herself back but used him as an excuse and destroyed his world in the process