How do you deal with your son-in-law's parents very controlling?

There is very little you can do to if your father is over-controlling. This is not to be confused with the similar, over-protective. If your father is trying to protect you from others and harmful situations then he may seem controlling in the process.

If he is over-controlling, then you can explain to him the way you feel and hope he listens to the way you feel, or if you are old enough; you can move out.