Let's break a myth as an opener: the thing wrecking most couples is not communication.
I know everyone loves to run to couples therapy and lament "we have a communication problem," and then do all kinds of conversation drills. In the overwhelming majority of cases — it just doesn't work.
Because usually the problem is not your communication. The problem is the broken ideas that settled into the mind that produces the communication.
I mean the broken ideas that make up your perception of your partner, and your perception of the thing called "a relationship."