Honestly, while I hope Bill finds a new job soon, there is a lot about his direction of D&D and the products he has had a hand in that I despise.
Going all the way back to the 90's, when he did the Revised Dark Sun campaign box. I felt like he butchered the Dark Sun setting and watered down and neutered everything that was cool about the original setting.
Throughout the years, I have found that I disagree with his vision of D&D and stewardship of the brand. More recent examples, include the increasing move to all digitial subscription based content, and the online tools fiasco. The cancellation of paper Dragon and Dungeon, and to add insult to injury even the removal of compiled PDF articles. The ever progressing boardgame-ification of D&D, and so on to name just a few.
All of it has his fingerprints all over it. I just hope whoever takes the reins next can salvage the ruins of the game I grew up with.