It annoys me when companies/people (not you) refuse to accept that something may not be perfect or could be improved, maybe it's an American vs British thing but that we are the best, how dare you tell us we're not perfect, attitude is what caused me to turn my back on MS....It annoys me when companies forget the people who got them to where they are today.
When taking my exams i dared to question why something was done a certain way and the look i got was like I'd just dropped a fart in a lift, what followed was an hour long conversation that mainly focus on explaining that i wasn't attacking the product, that it was meant as constructive criticism and trying to reassure the examiner that it didn't ultimately matter before he could bring himself to admit that how MS had designed a particular thing to work was less than optimal.