The answer to the fundamental ills of both Ethereum and Bitcoin is addressed in Cardano, which has been hard at work for 2+ years to create Ada and the first formally verified PoS type algorithm, Ouroboros.
I wish more people would wrap their heads around the rigid approach to developing Ada that Cardano's taken so the light will come on... sort of like seasoned imperative language programmers who get bitten by the FP bug, the same kind of cathartic effect is achieved once you begin to understand the fundamentals of what Cardano is doing.
Visit CardanoHub.org for more info and get ready to be processing new info for at least a week to begin to understand it.