That's not what those proposals were. Single payer healthcare and state-provided education is how you fix those problems.
We're promising kids that if they study hard in school they'll be elevated to the middle/upper class by their degree, but in reality most of those degrees are almost completely worthless for building a career.
People are graduating with 4 year degrees in business, math, assorted liberal arts, and then they're saddled with 6 figures of debt and not any more appealing to companies than someone with a year of experience in a desk job
Another problem: So many people are getting pushed into getting 4 year degrees now that they're now a requirement for many jobs that don't even need them. Sure, a CS degree will help if you're building some Google-scale backend code, but you really don't need one to tinker with a small web storefront's layout bugs
a) giving 20% of ownership of large corporations and 40% of board seats to workers?
b) breaking up the big banks and helping community banks.
These are insanely good ideas and aren't simplistic. Unfortunately, many, including you, only scratched the surface of what Bernie was about.
I am still hopeful for our future, maybe foolishly, but I am. If there is a silver lining of Covid-19, maybe it will highlight some of the insane bureaucracy and regulatory capture that are strangling our institutions in the US and lead to improvements. Don't get me wrong, we also need some progressive policies targeted at helping those who are struggling most, but those policies will only be effective if we also recognize and address the underlying cost disease issues. Just look at progressive havens like San Francisco to see how much money can be burned on well-intentioned ideas without achieving any results, if you refuse to acknowledge the underlying causes.