I don't agree that all of it has always been trash, but the quest writing mostly always has. For your Skyrim example, I went to the midnight release. I completed the main quest within a 24h period IIRC and I remember just being incredibly disappointed. I haven't finished it again since. Honestly, Skyrim in general is a letdown besides the world they built, although they could have done a lot more to make it more interesting and feel more lived in and real instead of an amusement park.

Their writing in the past has been really strong in world building. They've had really interesting lore and reasons for us to be doing what we're doing. Most of the people who did that are gone now though, and they have been for a while, so I don't expect it in the future.