The high fees of gwei in Ethereum transactions are due to the supply and demand dynamics of the network. When the network is congested, users need to pay higher fees to prioritize their transactions. The popularity of DeFi and NFTs has increased demand for Ethereum transactions, leading to higher fees.
The standard gas fee of Ethereum for sending transaction is as cheap as Bitcoin right now. The fee dramatically decreased after the implementation of the PoS as consensus mechanism. The high fee you are describing is from the Dapps itself which typically charge extra fee aside from the network fee for taxes and business profit.
Etherum dapps is worst because they are abusing the current demand on Eth dapps to charge unreasonable fee to their customers. Uniswap is the number dapps that charge expensive fee for making a trade.