I agree with you concerning ETH. I don't like it because it is centralized. I was fond of it because of its smart contract notion, until I understood the ridiculous and unnecessary disaster of Turing Completeness in such things. But you are 150% right. ETH has a lot going for it in the greater-fool market. (but DASH too - I won't touch it with a stick even though I know I could make a fortune with it - I'm not interested in making a fortune for very evil personal reasons ; I'm only interested in living the good life I'm living right now).
That said, I'm losing faith in decentralized systems. I think after all that Sun Tsu was right: the army that wins is the one that obeys its commander:
The Moral Law causes the people to be in complete accord with their ruler, so that they will follow him regardless of their lives, undismayed by any danger.
I can only think of small scale niche communities with a higher desire for decentralization than for benefit.