Every Conversation Ends In A Fight
You both had a discussion about something and your partner contradicts you on almost every issue for no particular reason. Those disagreements are more and more common until you start fighting on a regular basis.
Even when there is no good reason to fight they always seem to find one regardless of how banal it is. This is not a good sign at all. In the worst cases, these kinds of fights become worse and worse and can even lead to the use of physical force.
Then you have domestic violence which is much more common than you think. What is surprising is that even men can be victims of domestic violence. That is why it is important to leave an abusive relationship before that transforms into something even worse.