This is the key difference between a car crash and a relationship.Just because a relationship doesn’t work with a person doesn’t mean that they are a bad person.
Communication may break down for a variety of reasons, but it is between two (or more in some cases) people.
You can have as much self-worth and respect for your partner as you want. You can have as much clear communication yourself as you want. But if one person refuses to do that with you, you’re talking to a brick wall.