Conflict within a marriage is inevitable. Two people who come from different backgrounds, who have different world views, and who were created differently are coming together to live as one. There is no way to escape from disagreeing with one another.
When disagreement occurs, a game of tug-of-war usually follows. Both people in the relationship are fighting to get the other on their side, or to see things the way they do. Though, It is completely normal to simply struggle to understand each other's point of view, disagreement often turns into a dispute. Disputes can lead to strain in the relationship, and when the relationship is strained, resentment creeps in.
Both people in the relationship will unknowingly try to change the other. Their intent isn't to change the other person but to get them to see things the way they do/ understand them. When one spouse tries to change the other, it is the beginning of marital sabotage. You can NOT change another person. However, you can change yourself.
The best way to improve a strained relationship is to look at your own faults and begin correcting them. When you grow, the people close to you grow as well. When you become the best version of yourself, the people close to you are inspired to do the same. The most powerful thing you can do for you relationship is self-improve.
Start with practicing patience and understanding. Open your mind and heart by accepting the fact that your spouse is DIFFERENT than you. You two were raised differently. You have different personalities. There is no possible way that you will agree on everything. Accept it. Repeat it over and over in your mind. WE ARE DIFFERENT. And then make it your mission to understand them, even if they aren't attempting to understand you.
You have to remember that it is not about you getting something in return from your spouse, it is about you improving yourself and becoming the best version of you that you can possibly be. Don't be naive and think that you aren't part of your martial problem because 90% of the time, BOTH people play a role in the conflict. Work on being more patient, understanding, and having a clear view of yourself. There is a great chance that it will tremendously improve your relationship.