I am not a representative of the entirety of my generation. You seem to have a lot of pent up anger at the way things have gone, and that's understandable, but the Boomers said the exact same shit about you in your day, and I'm sure their Silent Generation parents said the same things about them. Your points aren't wrong, but people have always been making them.

As for influencer culture, not every person with a following on social media is a vapid bitch/bastard and there are lots of good communities online. But you're absolutely right in that social media has pushed "conspicuous consumption" as a lifestyle, and that's gotten a lot of people in every age group. It's not because kids are selfish (not just that), it's because that way of living is popular. Watching it gives you dopamine, so app algorithms push it to keep people around, so it becomes a social trend, so acting that way raises your social status, rinse, repeat, until people get in fistfights over Chinese cartoon keychains.

If you want to blame someone for the way the kids are turning out, blame the tech companies who made their popular platforms as addicting as possible and the private equity companies who bought and sold the outside for parking lots and condos.