B.C.
My father in law never liked me. He said I was no good and would never have a job and if I ever found a job, it would only be by accident. He said I was stingy, cheap, etc. and would never treat his daughter right.
When I married his daughter, I was broke, watched every penny and was trying to get my bachelors degree in finance. I took a job in a mortuary as a night watchman/janitor because the pay included a studio apartment. I tried my entire married life to please my FIL & MIL. My MIL finally came around after about 15 years. Now I'm her favorite SIL.
I brought my wife to his death bed where she and her brothers said good by. He was still cussing me after his daughter and I had been married over 30 years. All of my brothers in law came up to me afterwards, separately, and apologized for his untrue criticisms.
Why did I tell you this? Some people take a stance and refuse to alter that stance. "Don't give me the facts, I've made up my mind." Pride? Ego? I just don't know.
How to solve the problem? Have a dinner with your dad or maybe with your mom and dad. Tell him you love him and love your husband. Tell him its hard on you to see the two men you love at odds with one another. Ask him point blank what it is he doesn't like about your husband, and how he can change that. Then act on his statements. Thank him and leave.
Those that are reasonable, ask your husband to change. Those that are not, tell your dad he is not being reasonable. The only way I could have pleased my FIL was to have committed suicide.
Good luck to you and yours.