Constantly harping on someone's weight, lack of knowledge in an area, lack of being romantic, lack of interest in sports, etc. fits this category. It is critical to marry a person as they are, not what you think you can convert them to. Conversion, reformation, etc. is a major putdown, and clearly indicates dissatisfaction with the person that is. These many factors can lead to constant tirades, arguments, miscommunication, absence of understanding, and complete lack of nurturing. The adaptive process to this can adversely effect the marital partners and their off-spring and actually cause these dysfunctions to reoccur through subsequent generations.
Anger implies a breakdown inside or outside the marriage.
If the source of the anger is outside the marriage, but it is refocused on the partner, is means something is very wrong in a marital relationship. Often, anger is a by-product of feeling neglected, passed over, treated unfairly, insulted, infantilized, cheated, or emotionally abandoned. Anger is a symptom of something which needs to be dealt with by the individual in as cool and rational a fashion as possible. Anger can be suppressed by weakness, passivity, and compliance. Emotional distancing and going through the motions like a zombie will kill a relationship, or, in essence, ratify the death of a relationship.