About this, you're not alone. As a matter of fact, other Ethereum holders have had the same question as you throughout this bull run because during the last bull market when bitcoin peaked at around 66k, Ethereum peaked well above 4k, $4.4k if I remember correctly.

I don't know the entire reason but it is mostly linked to the fact that most people moved on from ethereum as there are more hyped and better chain (supposedly).

Also, Ethereum is no longer the ultrasound money we thought as the inflation has surpassed the amount of eth burnt in recent times. The transition to POS made this look worse.