Because the system is so terrible that young people who have to grow up in it are most aware of how disgusting, traumatizing, and awful it is.

When you're an established boomer who has a stable income and can narrowly focus on your career, groups of friends, or hobbies on the internet you can insualte yourself from terrible globohomo culture and state indoctrination at public schools. Zoomers and millennials can't do this, so they have the suffer the brunt of globohomo propaganda, instituionalized racial discrimination against whites, and the gutter of popular culture. Boomers also didn't have the internet (or aren't as savvy) and didn't have to grow up with social media. Zoomers and millennials are more connected to this and the educated ones are more politically aware of what is actually going on. They also have more interaction with nonwhites than boomers do, so the whole "hurr durr race is just skin color" boomerism doesn't fly with many more them