It's comments like that that make me sick.
My father bullied me for years, telling me I'd never grow up to be anything, and that because I was so stupid I'd just be cleaning Tesco or shovelling chips in McDonalds.
I worked my arse off, got perfect GCSE's and A-Levels and got a secure place in University (that I had to put off because of my pregnancy unfortunately!).
And now, all of a sudden, people like my father are telling people like me that we are "entitled" and arsey because we feel like we should be doing more than "just shovelling chips", when it's their own fault for telling us that, unless we do well we'll end up in a "fucking horrendous job".
(FWIW, I'm looking for work but can't find a single job at the moment.)
If you enjoy your job, then you hold your head high. People are going to be bitchy about anything, given half the chance. Just ignore it.