There is no short term solution to this. You need a long range plan.
It's easy enough to say, "Leave home" but if you don't have a good job or a decent place to go, it could actually be worse than staying and learning to deal with some adversity. And learning how to deal with adversity isn't a bad thing. It's a good life lesson. Of course, OTOH, you're never going to win any debates or arguments with a hard-core believing JW. But you can learn to co-exist together under one roof, until the time you decide is right for you to move on.
You're 19. What about college? Or even a local community college? While living at home even? This may mean a certain amount of duplicity on your part. This is the part about dealing with adversity. You know that JWs are zealots and can be unreasonable. You have to play the game a litte to keep your dad off your back while you continue to work your long range plan.
Once you get the degree and get off on a career path, you can find your own place to live, get out from under and then live your life on your terms. Even then it creates a new set of problems, because parents will always be parents and think they know what's better.
And to repeat...you're 19. As much as you don't want to hear this...you're not all grown up...yet. The fact that you're dependant on your dad or uncle for a roof shows you're not ready to tackle the world all alone. And even though you don't realize it, you have plenty of time to get where you want. Youth is always so impatient. Lean patience and outwit your opponents through time and planning.
Good luck to you...