For me, it’s more about how much I enjoyed the experience than a simple dollars per hour equation or something. It’s a very case by case basis for me.
I remember when Alien:Isolation came out, I told people I got my money’s worth in just the first hour from how scared shitless I was the first few times the xenomorph came out to hunt you.
On the other side, I got Starfield for $20 off in the release week, but despite how many hours you can sink into that game, I found the entire experience rather bland and dull and regret buying it.
Sometimes you just have to accept that the problem exists between the keyboard and chair and work around it.