is normal for two different people with different beliefs, background and orientation to have misunderstanding. There is absolutely nothing wrong with that. That does not mean they don't love each other. Even the tongue and teeth in our mouths do fight once in a while but that does not mean they can't come together later to work harmoniously on the food we eat.
Same is with relationship. The fight that is being experienced by the couples helps to strengthen the bond between them especially if done appropriately. The love can't be dwindled by the fight but it rekindles the amber of the love they have for each other, if truly the love is genuine and unconditional. But the fighting or misunderstanding shouldn't be happening frequently and when does it should be treated with utmost wisdom so that it doesn't get blown out of proportion.Simply because there is no perfect relationship. No matter how much you see yourself in your partner, the truth of the matter is that you are two different persons, with different ways of thinking, perception, and opinion on things. How do you think relationships last? It is because they are able to overcome all these differences and choose to be together despite having different ways of thinking, perception, and opinion on things.However, there may be times when the fighting would be too frequent, and I think that's the time you need to reflect if you two are best suited together. I won't advise you to stay in a relationship if it's so toxic and is draining the life out of you. So if the number of days that hurt are far greater than the number of days that don't, then I think it's time to leave