If your Dad was abusive...
Make home-made cyanide. Then go in and 'talk' to him. Then, 'complain' about the bathrooms. Check for cameras, and then do it. Poison his drink with it and then make an escape. Make sure you are natural about it. Or once he's drank it, take the drink away for less proof.
Not the best idea, but it'll get him out. His company will live, your Dad won't.
But if you just hate him, he gave YOUR sperm to YOUR Mom.
Why?