Whenever I get into a fight with my wife, I cut internet access to the bedroom tv and all of her devices.
What does cutting her access to the internet even accomplish?
It's just a way of punishing her for disagreeing with me.
Having arguments with your spouse is something that everyone who is married will have to do but punishing them for it is wrong. You're basically trying to tell her that she's a child and needs to be punished for acting out. That is extremely controlling and borderline abusive of you.
I don't care I feel justified.
You sound really abusive to think you are justified in cutting off her access to information. Have you tried couples therapy? If you keep this up she may leave you.