A lot of people don't know the difference between capitalism and ... having markets and shopping and little coops and companies in non-super-essential economic sectors that operate independently.
Markets existed before capitalism and will exist after.
Right now I'd simply take functional regulatory bodies, libraries, public schools and public colleges and investment in pre-natal health care as a start.
Or even skip that and just raise the social security cap and restore the old corporate tax rates.
None of this is radical or an alternative to capitalism- but I'd rather see that problem tackled on NOT empty stomaches.
Assuming capitalism is inevitable, unchangeable and the best we can do is just as bad. You are eliminating a whole universe of solutions because you've bought in to the propaganda from people who benefit from the current system -- who are just trying to preserve their disruptive pockets of wealth.
If we adjusted how corporate charters work the first one could be do-able. And it's possible to have a mixed economy of private, public and worker-owned companies-- which could be interesting.