India has set an example by banning Platform owners from owning companies that sell on the same platform, therefore ensuring a better level playing ground.
It is not perfect, but can be a start.
Amazon's subsidiaries must not be able to sell on Amazon marketplace. The giant needs to be broken up. The Marketplace, the Warehousing and the Logistics must be three different businesses and other players in warehousing and logistics must be able to offer their services.
The free shipping must go unfortunately.