EOS? $22 ATH but now, $2. That's a 90% drop that they were not able to recover. It was a buzz when it came out in 2017 during the ICO craze. Even dubbed as the "Ethereum Killer". Now, there isn't much hype around this coin anymore, not even a few mentions of the coin's growth, and their Twitter account seems dormant since last year2021; so I guess it is safe to say this coin failed to kill Ethereum.
I believe EOS used to be focused on developing gaming and networking platforms.
but, from what I experienced, the EOS network is quite lacking, even to get the wallet, you have to pay CPU rent first to be able to get access.
In contrast to ethereum whose network is completely free to use, it is very simple without a CPU and even focuses on various platforms including gaming.
The demise of EOS also seems to have been replaced by Binance Smart Chain, Solana, Polygon as network projects that will become an alternative to ethereum and even they deserve the title of "Ethereum Killer" at this time.