See, I think capitalism can work, we just need way more controls. Taxes that prevent billionaires from ever happening. Incentives for corporations to invest most of their profits into R&D.
Make smaller profit margins necessary to stay afloat. That means they either need to cut prices and/or invest in people (which is essentially what R&D is).
Actually enforce antitrust laws. Make forming a corporation, let alone a conglomerate, unpalatable compared to forming an NPO.
The biggest poison is the profit-driven media landscape (traditional and social). Particularly "news". Something needs to happen there, first.
Put a 500% tax on political contributions from PACs and a hard cap on total political donations from an individual (that's actually enforced and loopholes closed up).
Capitalism without corporations. Without billionaires. With strong regulation and very limited lobbying. It could work. It'll never happen, but it could work...and it's probably a necessary stepping stone to full blown socialist utopia.