The millennials have never experienced capitalism. They have lived under corporatism which has given them crushing college debt, jobs in the service industry, and a bed in the parent’s basement.
They have told that capitalism caused their situation.
Bingo.
When all you have experienced is crony capitalism you would hat capitalism.
I would hope we can establish capitalism in the U.S., but it will require radical reform of our principal institutions.
Ask any of the them what capitalism is and they can't truly tell you what it is; only that they know it's bad (because the Soro's Open Source Society told them so). I've had this discussion with a few of them and I ask them "how can you hate something you can't even define?" usually ends the discussion.