Even Skyrim wasn’t bad. I put like a thousand hours into it. It’s just not exactly what I’d call “ultimate”.
Oblivion was good. It’s dated at this point and like Morrowind combat is not comparable to say Elden Ring. Oblivion solves the whole open world (as in OpenCities) thing in mods, but Morrowind has it to start with. Which is why I think Morrowind is the closest the series has been to my ideal.
Rather than saying it’s better than say Oblivion, I’m saying it’s closest (among the ES games) to being what I’d want out of an “ultimate” ES game. Oblivion has mods that fix its bixest shortcoming (OpenCities and various magic mods) but I’m not inclined to give Bethesda credit for the work of modders.