I am in my mid 30s and I manage college students. I completely agree that issues today are not specific to one age group. I am a firm believer that the main culprit is social media. The fact that there is very little accountability in saying what you want to say, judging others, or just plain being a jerk. Some of these kids are my absolute favorite people on the planet. Some of them make me want to cry because they are so awful! Some have a crazy sense of entitlement and it's very apparent when they are called into my office to discuss poor attendance or poor productivity that this is the first time they have been told they are not meeting a goal or need to adjust their attitude and they do NOT deal with it well. I want to note, prior to this role, I managed adults at a large company for 10 years and had similar issues when providing less than glowing feedback.
I also want to point out that its increasingly frustrating to work in an age where the general mindset is everyone deserves something. I frequently give prizes or bonuses to kids who pick up extra shifts, and other students who are barely working the minimum will throw fits and tell me it isn't fair, how come they don't get anything? Are you kidding? EVERYONE who works extra gets something... but, you need to work extra....? I don't understand why this is hard? I'm running into entitlement problems far more often than just bad manners.
Edited to add: the one thing that absolutely KILLS me at work is the lack of gratitude. For example, in the past 2 weeks I've brought in tacos for everyone for Cinco De Mayo, brought in my laptop and a projector and popcorn so we could watch Star Wars during shift on May 4th and today brought in donuts for everyone working an extra shift. Want to know how many thank yous, or even people acknowledging these things? 2. In fact today, instead of getting a thank you for donuts, one kid complained that "the assortment sucks". Neat.