Ethereum's high transaction cost issue has been around since bullrun 2017 & ETHKitties event, but the community still loves Ethereum, DeFi projects in 2020 also choose Ethereum over other platforms with lower transaction costs. The reason is that Ethereum has a huge community of supporters and the Ethereum development team is working very effectively.
Going back to the problem that you set up: SOLUTION FOR ETH HIGH FEES. I think we have several solutions:
+ Wait for the development of ETH2.0 in 2021. If ETH2.0's scalability reaches 1K tps, we will see transaction costs go down;
+ A few projects use other platforms to relieve pressure on the Ethereum network. I think Cardano & Polkadot are the best options.
Cardano has no interesting projects, from memory I can say that there are 1 or 2 projects on this platform. This platform is trying to develop in the corporate financial sector.
Polkadot is still developing and does not have such an ecosystem as Ethereum.
If phase 1 on Ethereum 2.0 starts soon, then users will have the opportunity to send ETH coins on the Ethereum 2.0 network with a reduced commission, and tokens will work only on the Ethereum 1.0 network.