Do you think it has underperformed, or is it doing okay?
Mostly underperformed up to borderline okay performance. A lot of people who have little knowledge watch only the USD chart, which is wrong. Many people who got some ETH would have bought BTC instead if they didn't. If you look at the ETH/BTC chart it looks bad. It has bad performance even with all the lobbying and bribing that can come from a centralized project like ETH. I was here when it first came out, even before the fork that happened which show ETH and ETC diverge their path. I can tell you that nobody thought it would be as big as it is today.
It was about 9 dollars when I first saw it, and I do regret not getting some, I wish I bought with all my money, but that is the old days and no need to keep regretting. So nobody assumed a 4k+ barrier would be broken when we were back at 9 dollar price.
All these "why isn't it 10k+" questions came in much later, when people saw the bull run it had in 2021.
There were even talks of flipping bitcoin at some point, when you get that much confident with your investment, what seems like an unrealistic expectation, becomes an expectation.
Only idiots were fooled by this talk. 