The launch version of Skyrim had enough bugs it could be considered biohazardous. Many patches later and it's still extremely rough around the edges. None of this includes the various other problems.
The HD-Pack Bethesda released is missing textures, eats resources like a pig, and only runs for a select few people.
The CK is full of many bugs, some of which significantly reduce its functionality.
I'm contemplating whether or not I'll be buying their future products. Quality-control is not a concept they understand.
Judging by the number of sales Skyrim got, I don't think they'll be learning from mistakes any time soon.