Explaining

This is why I support the death penalty:
People who ask you to explain something and as you proceed, they cut you off and ask you to repeat what you just said very clearly. Or they'll repeat what you're saying as soon as you say it, except now you're saying something else and they are always a second behind. Or they will disagree with what you're telling them even though they asked you to explain something that they presumably did not understand in the first place. Or they'll ask you to spell a word they can easily look up, or tell you to slow down or speak louder or pronounce each word syllable by syllable. Addresses are especially difficult to convey to them. No matter how detailed the directions, they want more. If you give them a major street, they want a cross street. If you give them that, they want the name of a business to look for. If you supply that they ask for the location of the nearest Post Office so they can get better directions. All the while, they are scribbling indecipherable gibberish on a pad which they will probably misplace or forget to take.
If you act peeved they will glare at you like you're the one with the problem. How to avoid this: act so dumb they won't dream of asking you anything. I hope you understand this explanation because I'm not repeating a damn thing. I would like someone to explain the reason why people pushing carts always run into me.