Many people don’t like dealing with the anger of others – especially when it is an ongoing thing. Even if there is no fear of the angry person, it just gets old, and many find it easier and less emotionally draining to avoid the person when they are angry. The problem with this is it means there’s no communication, no resolution, and no growth.
If anger is causing avoidance in your marriage, your marriage is in trouble. Deal with it before it’s too late.