The TVTropes Trope Finder is where you can come to ask questions like "Do we have this one?" and "What's the trope about...?" Trying to rediscover a long lost show or other medium but need a little help? Head to Media Finder and try your luck there. Want to propose a new trope? You should be over at the Trope Launch Pad.
There's plenty of tropes that would fit the bill, according to the situation: Selective Oblivousness, Dramatically Missing the Point, Comically Missing the Point, or talking to The Ditz and a few more under the Poor Communication Kills super trope.
Slava UkrainiThat's it. Definitely the last one that eroock just said.
Man, I know Tropes Are Not Bad, but this one is just...
H.B. WardDepending on the context it might also be Layman's Terms Exaggerated. Or They Just Don't Get It.

Here's one for the masses. Infinite Communication Barrier. It's when Person A tries to explain something simple to Moron B, but it's literally impossible and every attempt to explain goes way over their head.
Surely this is a trope already. Right?