Two things.

One is my grandfather declining rapidly in health in old age and apart from not really being comfortable around old people (fear of death or something) I also found it hugely difficult just to carry a conversation with the man. So I barely visited him at all before he died. I told myself and my mother that it was because he was in such a bad way and that's not how I wanted to remember him. That's partly true but I was just uncomfortable trying to communicate at all.

Then the other one: my wife frequently makes me repeat myself. And I'm fairly certain it's not even because she didn't understand me, it's because she didn't process what I said. I feel it's more the disrespect of her not paying attention. And it happens at least daily. One time I sort of snapped and asked 'Do I really speak that unclearly?' and she sort of said that I do. But the thing is that others don't seem to have that issue with me.

And the other way around is also very annoying. When I don't understand others. And it's not just auditory, either. Some people just really don't know how to be clear. They just blurt out any couple of words, sometimes misspelled, and leave interpretation to me. I think it's just a sign of disrespect if you communicate like that.

Edit: sorry, I just started my rant and forgot you wanted to know how I deal with it. Well, here comes the bad news: I adapt to others. I'll repeat myself, slowly and more clearly. I go out of my way to try to figure out what others mean when they're being unclear. Stuff like that. It's exhausting really.