How do we know if all the small battles we go through in relationships are healthy or not?

Doesn’t it seem like in the media and in our lives, we see long term relationships as two people bickering back and forth? One person wins an argument over here, the other person wins an argument over there etc.

It just seems like a lot of relationships are like that. Why do we do that? Of course we can’t expect two humans to be completely synchronized for decades, but do we accept these small battles as a part of a relationship? How do you know if the battles are healthy or not?