I had two mentors who had attempted marriage, but it was also not a good fit. They were brilliant, creative people. The female mentor (INTJ) was strongly opinionated, independent, and preferred life on her own. She owns a cabin where she spends her off seasons.
My mother divorced out of an intensely abusive situation in which the courts did not give her or her children the reasonable amount of credit in such a situation. She never remarried. She once said that for every marriage she has ever seen, there is nothing there that she wishes for herself. She is an ISFP.
In other cases I have seen the expectations of marriage have a negative emotional effect on perfectly wonderful individuals. If you do not function in the prescribed manner for marriage, you are criticized or seen as less of a person. Some people need significant amounts of personal space - more than most marriages can accommodate. Some people just don't enjoy the sense of being attached to another person until one of them dies. Other people are strongly independently minded and have a particular way they like to do things and see no point of compromising on every detail of life with someone else. Some people are so devoted to their work that there is not time or energy left for a spouse (and before you criticize these people consider that one of them will probably cure cancer. ) What I have mentioned here is the tip of the ice-berg in terms of how some people can't fit into the social structure of a marriage. The actual institution of marriage is problematic and at times degrading to these people.