How to deplete curiosity?

When in high school, I used to spend all day on LW, or reading SSC, or mostly watching stuff on Youtube. Then, I went to uni, and I got really dissatisfied with my degree, at about the same time Covid hit. I was bored to death by what I was learning. But now, looking back at it, I think my brain got used to it? That’s the problem I’m trying to think about here: it seems like I’m not as curious as I used to be? And I’m curious why that would be so? Is there some kind of rat race of curiosity where one has to keep up with others? I don’t know how to phrase it, but it seems like some kind of feedback loop, where boredom creates less curiosity? But why would it be so? Isn’t that supposed to be the other way round? Or is there something wrong with me here ;-) ?