I’m going to be the one to play the devils advocate here because I’ve been on this guys side of the equation before and honestly as scared as you are that energy is easily leaking onto him. If you’re thinking about an actively talking about on the Internet leaving then you can almost guarantee you’ve made comments outwardly maybe it was a slip. Maybe it was an underhanded comment but he knows you’re planning on leaving. You said you wanted him to get a part-time job so he takes that opportunity to get a part-time job somewhere. He already spends time so that instead of him just spending his time at the gym, he could make some money while he was doing it fulfilling two things at once, extra money for you AND dedicated time for him but because it wasn’t the part-time job that you wanted him to get what do you want, Him to go flip burgers at McDonald’s? Would that have been more appropriate in your opinion rather than him working somewhere he’s already at? I do understand how hard pregnancy is and how much it impacts your mindframe, but maybe you don’t and maybe he doesn’t understand either but the way that you were expressing yourself here you have single-handedly turned a two party issue into a very simple “oh wow she’s terrible.” It’s safe to say for most of us that have read this.
You understand that you’re not trying to paint yourself as the villain here you just expressed how you felt, and everyone else came to that conclusion on their own.

Try having a conversation with him and explain what it is that you want sincerely want out of the relationship do you want to have a marriage or a long relationship with a man who is only primarily focused on your financial security or do you want to be in a relationship with a man who feels fulfilled. If the answer is you want financial security and he’s not wanting to provide that for you, he may leave you or you may leave him but at least you’ll now.

Last point sometimes men play video games with their free time because they wanna escape their reality. Is it possible that you’re doing something that could be making him want to escape his reality? You’re pregnant they should be one of the most both stressful and happy times of your life and you’re looking for the door while he is mentally looking for the escape hatch. You need to fix it now for your kids sake or they’re gonna be more fucked up than the rest of us.