I mean, the mom is hot. If she wasn't always so tired she would be even prettier.
But she is right, the two of them could leave and work things out. Grandma and shithead are baggage. Grandma has dementia, so it's justified, shithead though... you know, you might be depressed, broken, laughed at and seen as a pathetic piece of shit, but only if you have enough resources to survive you are allowed to feel bad about yourself. If you are struggling to survive, those kinds of thought come a lot less often. This guy might have his issues, maybe not passing his exams made him the laughing stock of his year/class, but he can only feel bad about himself, because he is leeching off his family. He is just a fucking leech.