I'm a father of teen kids, teacher and educator. I don't think that there is a single reason here. All mentioned things contribute – social media pressure, climate problems, economical crisis etc. But I'd like to add another one – declining quality of education. I see increasing number of teens depressed because they don't have teachers and their education isn't good enough for jobs they'd like to get in future. And…
There's also been a corresponding dramatic drop in the number of teens who have had any sort of job. Not many things are as fulfilling as doing a job and getting paid for it. I remember when I realized I was making enough money that I could pay all my bills and no longer needed anything from my dad. It felt really good. For me that was the dividing line between being a child and an adult.
Sorry, I don't get fulfillment from a job, nor do I base my personality on it. A job is a thing that I have to do to live and do some stuff I like.
That's it, nothing more. I'd never do actual work unless I had to, and I'd never work full time if I didn't have to. I'm never going to be motivated to work harder for a fancy car if I can have a reliable, efficient car. I'd like more space, but it needs not be huge or pretty (though, I'd like to cook and make art).
Making art is fulfilling. I enjoy making food - work means I eat more convenience foods. I don't need to be paid to help folks, either. I can get a sense of accomplishment by doing things that are difficult, from projects to playing games.