In the older days I thought the most annoying thing is a bad quality. Things making a noise while you’re drive are really annoying.
Today I think we are not so tolerant with deficits in a lot of meanings. The car should not use a lot of gallones per mile ☺ or the assited drive systems: when one of them are not working 100% perfecr we are annoyed. Noises from the interior or not propper mounted parts are absolut not acceptable.
No one will today accept an engine fault.
What do you rhink is annoying?