In an unhappy marriage the other person is normally the source of unhappiness. Not always of course (I knew a guy who got divorced because he felt he'd missed out on having more relationships).
Sure, if you only look at the minutae. At a high level, a relationship is a bond between two people, so it's unfair to lay all the blame solely at the feet of the other person. You've probably done things that make your partner unhappy as well.
The mature way to approach the problem is to work together to resolve the issues -- or if that isn't possible, terminate the relationship. You can't just make yourself the victim and say it's all the other's fault.
The mature way to approach the problem is to work together to resolve the issues -- or if that isn't possible, terminate the relationship. You can't just make yourself the victim and say it's all the other's fault.