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.
Who wouldn't everyone is now complaining of the high gas fees, not just ETH but BTC lately as well. And as far as ETH goes, we thought that when they to POS this whole high fee issues will be settled or at least minimized.
But with the whole Defi and NFT's is the other way around, transactions are clogging the network now and each and everyone are vying for their transaction to be first and so they don't have any solution but to increase the fees and so this is the result. The worst thing is that we are not even in the bull run, so expect that this is going to be worse at time goes time and we need them to come up with a good solution.