the main issue in the ethereum network is the clogged network, which makes the network working harder than usual and affects the miner's effort and higher fees.
Yeah right and miners are choosing those who are capable in paying much higher fees to prioritize and earned much better.
One of the major causes is the big amounts of DeFi projects that mostly using ethereum smart contracts to build their project.
There are flowing money from this project using ERC network make it more busy.
The increasing of activities apparently become an issue for ethereum networks and it's also referring to ethereum scalability.
Most of it and the fact that there are still many developers who used this chain and continue to transact using this system.
It has never been the fastest cryptocurrency anyway, ethereum become massive because of the smart contract feature
yeah, stability and good codings not the fastest but developers entrust their project to this chain.