I'm angry at my wife's family
Why are you angry at her family?
I just don't like her family.
I'm sorry you're not getting along with her family, and they shouldn't have to make you feel that way. They should be more considerate of your feelings, and you need to have a discussion because in the end you are all family for the next several decades.
I just think they are a bunch of old farts and they shouldn't do the stupid things they do. My wife should just leave the family house.
You cannot ask that of you wife. Maybe you can talk with her about boundaries and how much you will tolerate with them. Set aside some time where she visits them and you stay home.