[osense]

Middlemen? Since when is a cluster of decentralized nodes a middleman?

Yes, it turns out that making a decentralized system both secure and scalable is a difficult problem, so people have been looking for ways to deal with it and improve on the original solution of Bitcoin (which, by the way, as I'm sure you know, has incredible energy consumption just to validate less than 5 transactions per second. How is that global?). I don't think that organizing decentralized nodes into some sort of bottom-up structure takes away from the P2P nature of blockchains. Just because a solution to a problem is not trivial and easy to understand (which Bitcoin is from the point of view of many more contemporary protocols), does not make it invalid.

At least Solana is a level 1 protocol, as opposed to some other solutions like sharding or zkRollups which add even more complexity.