My younger sister is the same way, except even though she's dropped out of school, very much nearly failed out of high school, and literally does nothing but sleep and do **** on her computer, she is god's gift and can do no wrong and is never held responsible for a single thing. Like, she isn't even tasked with taking the dog outside for a bathroom break. It's not unexpected to come home to dog accidents when she had been home the whole time. They finally got her into a medical billing program, but she hasn't told anyone if she passed her first semester or not. She's a very high functioning autistic, but unfortunately uses that as a reason to do nothing.
If you want to vent, you know where to find me. Families can suck sometimes.