If university is truly miserable then multiple years of it are going to give you lifelong issues with learning and set you up for failure later in life.

I'm not saying it has to be sunshine and rainbows all the time, but if you actually genuinely hate it then that's a worse outcome than being a blank slate. A blank slate can pick up a book at 25 and go follow their interest down the rabbit hole, maybe even go to uni. If you had a bad first experience then good luck unlearning all of it and getting back to the point where you're excited about art history or whatever. I also don't believe you can find something miserable the entire time and come out smarter for it.