Morrowind wasn't even good to begin with.
I agree. Purchased it day 1, it was a decent RPG but nothing super-special, people were mostly impressed by the open-world aspect and the graphics. Aside from that it wasn't that special, and looking back it is easy to see its faults
Oblivion tried to improve many aspects, and in many ways succeeded, but it also fundamentally destroyed a core part of what makes a good CRPG (ESPECIALLY the level scaling) and thus was even worse than Morrowind in the aggregate.
Fallout 3 was really the first game from Bethesda that deserved the GOTY award.