Ethereum is still a great coin, tho. I don't think its best days are behind it at all, and I believe the altcoin market is just in a slump. It's easy to predict doom and gloom when things aren't going well for alts, but this is a state of affairs we've seen many times before in the last 5-6 years. There are plenty of things that can be done on the Eth platform, so don't give up hope.
No one is denying the fact that ETH is a great coin. But they have ignored the issues for too long. Scalability issues were a concern for more than a year now and Vitalik Buterin and his sidekicks refused to act. Now they are talking about it, when the transaction fee has already climbed to a level that may of the users are finding uncomfortable.
ETH was first listed in 2015 (that was when the ICO came out). The popularity peaked in 2017, when the ICO craze was at the zenith. Back then, the major advantages with ETH was the very quick confirmation time (less than a minute) and the very low transaction fee (often less than one cent). But the situation has changed drastically now. From what I have found, the confirmations are taking up to 10 minutes now.