When will ETH gas fees be cheaper?

Hey, what's the current roadmap?

The PoS will be here soon but sharding is still far away?

BSC (or SOL etc) processes 5 times more transactions than ETH but is still much cheaper, mostly because they are more centralized so the nodes have good hardware/internet connections to process more transactions.

ETH's nodes are more decentralized, but can't process transactions that fast, so people who want to transact need to increase gas fees.

It seems block generation speed will be slightly increased in the upcoming version, but not block sizes? When will such parameters be changed so the network wouldn't be so congested? Or they won't be changed, because of compromises for decentralization, so gas fees likely won't be reduced until the distant sharding?