With all due respect, the analysis that this “proves” all of these things is quite a strong claim. It is, at least, equally as possible that BIP-110 was simply not a good enough of an idea for most of the network to want to adopt it. Just because BIP-110 didn’t pass, doesn’t mean that somehow that Bitcoin is too centralized. It could also just be a humility test that a better idea is needed. There are so many better ideas to solve these issues than BIP-110. Such as removing the witness discount.

I think your idea of what constitutes network is somewhat misplaced. Larger ecosystem meaning miners, exchanges, wallets are servants of the network. The actually network is the nodes relaying information to each other. They asked miners to mine blocks according to some rules and the miners ignored them. There was no refusal to bip110 from inside the network unless you count the inflated 30% of core v30+ nodes which did not explicitly say no.