I had the thought that the only way to really fight against large corporations and billionaires is to compete against them. Start your own business. Amazon relies on third-party sellers more than anything in their business. So start a business and sell your items there. Don’t have anything to sell? People are a creative bunch, make something. Find a local producer of something and make a partnership to sell on an independent web site.
I was kinda assuming not everyone lives in the US and in some countries it might actually be viable