I don't like the Star Wars prequels or Enterprise. Obviously I like Discovery, and I also like Better Call Saul. But if we want to keep in genre: there was a BSG prequel, Capirca, that I liked but no one else seemed to.
So I guess it depends on the prequel. Someone's going to twist what I'm about to say into something else, but my favorite prequels are the ones where I don't feel like I'm watching a prequel. Saul's story is disconnected from Walter White's. While we know what happens to the Enterprise, we have no idea what will happen to Discovery. And Caprica taking place before BSG with everything being destroyed means that it feels inherently different with the 12 colonies still intact and the focus of the series being so radically different.
With ENT, it always felt like a prequel. "This is how we met X race. This is how we met Y race. Oh, that's right! They can only go up to Warp 5. There's no Federation yet. Humans aren't evolved yet and the Vulcans keep reminding us!" It's Star Trek before it was Star Trek, "Here's Star Trek but we don't have everything there yet!" For me, constantly being reminded of what they don't have yet gets old after a while. Then there's the Star Wars prequels and how Darth Vader became Darth Vader... only problem was he was Anakin Skywalker first. And, yeah, I'll just leave that right there.