All couples disagree and fight. Happy and unhappy couples seem to disagree about the same amount. So what makes the difference?
What makes the difference is how these couples manage their conflicts. If your conflict begins in a hard way, with blame, criticism or contempt then the argument will almost certainly have a poor resolution.
If you suppress in the hope of avoiding a fight and keeping the relationship on a good track, that may work well in the short term. In the long term, these resentments will build and the feelings will come pouring out in a way which may be counter productive.
The goal is to express each annoyance in a descriptive way so that the two of you are able to discuss calmly. This will lead to a pattern that keeps both partners happy.