yes indeed everyone, including myself, complained about the very expensive fees in ethereum. But when I saw the ETH 2.0 project I felt they could solve the fee problem that was holding down ethereum.
but by looking at polka dots now I suspect that in the future polka dots can be strong rivals for ethereum because if you look at ETH 2.0 it will indeed make the ETH network scalable and more stable but it will still be less competitive with Polkadot because for now I can say the
features polkadot is slightly better than ETH.
Whatever happens in the future, I hope that ethereum can minimize the fee, because there are so many who still expect ethereum.
Polkadot won't do much to displace ETH because it requires an entire re-education of deploying and using smart contracts. You need to rebuild the network effects from step 1. That's like trying to climb a mountain, but putting a bag of rocks on your back first. It doesn't benefit from the encyclopedia of documentation and open source software designed for ETH.
Learn from CZ: To kill ETH, you copy/paste it, and make it cheaper and faster. BSC has blown past all ETH competitors very quickly, if you haven't noticed.