That’s what I thought, too, until they took down the art as well, and I found so many statements from folks that were offended by the main race image in itself, before even reading the story.
As someone else said, that isn’t the case. They were helped in freeing themselves by the apprentices of the wizard who created them to be slaves, because the apprentices immediately recognized that what was being done was wrong, and the hadozee ganked said wizard in the process of liberating themselves (with help), and then set about charting their own destiny. That’s the 5e story upon publication. The rest is from previous editions, and is not at all part of the 5e story.
So, bad, but not anywhere close to that.