pet peeve

pet peeve
n. Informal
Something about which one frequently complains; a particular personal vexation.

You know what I hate?

You know how some parking lots have the one-way lanes? It is usually pretty easy to tell the lane is one-way because of the giant white arrow painted on the ground!

The normal person will usually decide to go the same direction as the arrow. But every so often there will be this one driver, who obviously doesn't understand the giant white arrow painted on the ground, that will go the wrong direction down the one-way lane.

And to top it off, they will look at you with disgust, like you were doing something wrong, when in fact it is them!

I really hate that.