Exactly. If he didn't thank them, he would have been in headlines for not thanking them. Same shitty people attacking over anything. Lots of times and reasons to attack Bezos. This is not one of them.
I’m pretty sure you’re seeing that completely wrong. But even if you’re not, a good part of the criticism is due to the way he said it. There is a huge difference between thanking a group of people in some non-descript way, and saying “you paid for it” when many Amazon warehouse workers are working in hard circumstance for as little as Amazon can get away with. This workers would probably prefer some of those billions that paid for this self aggrandizing stunt to be used on something else.