Are you not concerned about the decentralization of Handshake's PoW consensus, considering that it uses a custom hashing algo that seems to be dominated in hardware production by a single company, Goldshell?
I believe you may be missing the forest for the trees by worrying about Ethereum's decentralization when compared to Handshake's.
Layer-2 systems (which allow some of the operations to happen off-chain) is how Ethereum developers are trying to scale the network capacity.