My Dad knows about the problems, they were worse a few years ago, and they have gone down a lot with my Dad's help, and as my brother got older, but there is still the basic issues.

My Dad doesn't really have "friends". He doesn't really consider our roommate his friend, but someone who he has known since before I was born. It is necessary that he stays, or else we could not afford to live here.

Basically, it's turned out to be a test of tolerance, but it's hard to tolerate such a person. Dad is on his breaking point too and if we could afford it, we would be kicking him out onto the streets.