Long time lurker here. I had to create an account to comment on this topic.
Speaking as a millennial myself, I do observe many of the things that older folks complain about.
The first thing I do in the morning when I wake up to get ready for work is turn on the news and watch/listen to it while I make coffee and breakfast. I like to keep myself informed of recent events. And yet I've found that most of my peers simply don't watch or care about the news at all.
Anyone remember the Haiti earthquake that killed tens of thousands? You couldn't go anywhere without hearing people talking about it. And yet, I honest to god ran into a few millennials who had no idea it happened. When I ask my peers why they're not interested in the news, they always say the same thing: it has absolutely nothing to do with them.
That's not all. I work at an engineering firm. We would "grade" each other's work to double/triple check each other's work. I've found that more often than not my peers would just do something in a hurry and submit their reports without making sure of the quality. It's annoying to catch the most obvious mistakes. This isn't college anymore, people! You don't do something in a hurry, turn it in, and pray that you got partial credit.
I've also observed financial irresponsibility in most of my peers. It's like watching a train wreck happening in slow motion but there is nothing I can do about it. For example, my boyfriend and I recently took his sister and her boyfriend out to dinner. I happen to know that the boyfriend recently lost his car because he couldn't afford the payments. He's currently sleeping at my boyfriend's sister's parents' living room couch. While we were eating, he bragged that he's been saving up to buy some fancy belt from Italy. He showed me on the phone and the price tag was $3600. I didn't even know fashion belts could cost that much
I've also seen someone of my age blow through $70k she inherited in a year. She eventually got kicked out of her apartment and had to move back to her mother's place. Her boyfriend left to go to Colorado to find work. He spent his entire first paycheck buying weed and posted it on facebook to brag.
I've found myself preferring to converse with older people more than people my own age because at least they know what the hell is going on around them instead of being oblivious to what's going on out there.
I can't wait to see what the next generation is like. Ever seen the movie Idiocracy? Sometimes, I feel like that's the direction we're heading.