It's the lack of perspective. There's nothing to work or live towards.
I'm in my early thirties and grew up in the last years of the "it's getting better" time, but nowadays it's all gone.
The political system in all of the West is ossified and unable to solve any of the real problems. Society is dominated by a gerontocracy. The economy is fucked for almost all participants, except the very few at the very top.
My generation will not have better lives than our parents. And there's absolutely no hope for it to become better . In fact, it's likely getting way way worse for most of us.
I already do vote and try to convince people around me, but here in Germany, the reality is that most people are old and stubborn (average German is 44, average voter even older) and the propaganda of the last decades worked.
Some still believe in trickle down and neoliberalism, some started believing Russian propaganda and are convinced that only right extremists can rescue us.
But that's exactly the situation I've described above. You see the ship steaming onto the rocks, but ⅓ of the crew thinks, that's fine since it worked so far, ⅓ denies the rocks even exist and the last ⅓ is convinced that rocks are actually an opportunity for growth.