I think it's a more complex issue than most people think, and most millennials aren't as bad as the stereotype makes them look. Social media, the internet, and the mainstream media have given the morons and slackers a bigger voice than they ever had in the past. That doesn't mean there are more of them. There very well may be more, I don't know, but it's certainly not the majority of the generation like most people perceive.
Technically I'm a millennial, born in 84, been working since I was 10 or so, went to college for a useful degree(was fortunate to have majority of school paid for by smart investments by my parents when my grandpa died when I was 3), got a job, been working my way upward ever since. I started working just as the recession hit the auto industry, so I spent the first 3-4 years of my career wondering if I was going to have a job the following week. Through hard work and probably crappy pay I survived it while watching many of my coworkers get laid off. Due to the financial uncertainty I lived with my parents longer than I had planned, and I admittedly milked it too long and spent too much on Jeep parts when I should have been saving. Live and learn. I'm 32, have a beautiful house, minimal debt, lots of toys, and hate the stereotypical millennials, but I also realize that they're not the majority.
One thing that also gets overlooked far too often by the people bitching about millennials is the world that we were forced to inherit. Many of us started our adult lives as the US was at the brink of economic collapse. Not helpful. Our parents, teachers, and advisors drove us to go to college, acquire staggering debt, and get degrees for jobs that weren't necessarily in demand by the time we got done. And no, I'm not talking about people who got useless liberal arts degrees, they're just dumb on their own. That's a different problem. College isn't for everyone, but that's not what we were all led to believe. Now there's a huge skills gaps while people work jobs they hate to pay debt they never should have gotten. Many of those people would be more happy, productive, and prosperous in a skilled trade. Cost of living vs income ratio is upside down compared to what our parents and grandparents had at our age. The government is more corrupt than ever. There are some legitimate hurdles facing this generation that others never had(yes, I realize they had others that we don't), the difference is that you hear the whiners a lot more now, but those of us who put our heads down and powered through to be successful aren't speaking up because we're too busy working. Black lives matter doesn't represent the majority of black people, ISIS doesn't represent the majority of Muslims, and whiny little entitled pukes don't represent the majority of millennials.