Yep, that's true and I think the reason it performed so badly only in the previous bullrun was the fragmentation caused by having too many L2 which significantly reduced the main chain revenue and also reduced part of staking reward, as a result lesser demand.
There was also fragmentation when ETH holder decided to dump their ETH in favor of governance token which proven to be useless today, fortunately L2 has started to close down one by one and there's only few left that is really needed to scale in time of high traffic. Hopefully the next bullrun would be different and ETH actually break previous ATH. I see no reason why it can't, it has low inflation, only 3% rise in total supply from 2021 bullrun and it has been the primary blockchain to use by Defi protocol again, projects rarely deploy to other blockchain or L2 but always to ETH directly because matured ecosystem.
Personally, I see this issue a bit more simply.
As we all know, it wasn't just ETH. Pretty much the whole alt performed badly in the last cycle. In other words, the altss we were waiting for never really showed up.
My take is, with ETF approval, all the big capital just funneled into bitcoin, and that shifted investor appetite as a whole too. End result, basically every alt lagged, ETH included. In investing, investor appetite always changes and money keeps rotating. So my guess is when the Bitcoin hype starts getting boring, that money will eventually rotate into ETH and alts.
I think ETH's looking real promising for the next cycle. Just my two cents, tho.