Dreams have the characteristics of satisfying wishes, such as wearing clean shoes, which is a metaphor for wanting a decent and comfortable marriage life. For example, if you want to throw away your dirty shoes, it means that you have the idea of ending your dirty and humiliating life.
The contrast with your dreams and desires is your reality: the world of two people is very unhappy and lonely, which makes you feel particularly lost.
I also noticed that you didn't mean the newly bought shoes. So, you haven't thought about leaving this man for the time being, but the sense of loss in your current life is obvious.