Most businesses get their inputs from suppliers and add value to produce an output.

Even if you could afford to build your own datacenters you could not make the chips. Any realistic business will have a web of suppliers.

I think before you can diagnose "feudalism" you need to think really carefully about who has power in what parts of the value chain, and why. This will be specific to the business you are in.

I agree, it is a real problem if your suppliers are acting in a monopolistic or market distorting way.