Life has gotten worse for me... help?

As you said, your Dad is an ex-military. Military people are kinda intense as they are trained to obey their superiors without qustions. It'll be hard on your Dad as he still hasn't got used to the fact that he's living a normal life now and that he got other people to care for. I suggest to talk to your Dad, get his point of view and please try to understand him. It would be best if you and your Dad have a counseling sesion together, then the both of you will be able to understand why the opposition thinks of you this way. And get him to exercise more, play some sports even. Or even better, get him hooke up with other ex-military people and let them talk about their old times together. This would loosen him up. Good luck!