Sanderson doesn't usually dig at anybody. He has actually declined several times to straight out criticize the show. You can tell from his podcasts that he would do things differently, but doesn't really throw shade at the show's staff. He was rolling his eyes a lot at the S1 finale, but lets be real it was awful by any standards even if was a generic show.
In this case I don't think he was digging at Bezos, but was explaining the environment. Having said that the changes are all on Rafe and the writers. They COULD have made the show closer to the books even with the darker tone, but they chose not to. Lets be real, the books get very dark later on so its not a hard job to trend in that direction without inventing things like Perrin killing his non-wife. That was simply a crutch used by the writers to avoid having to do any heavy lifting writing wise with the Perrin character in S1.
Had they done a better job with Perrin and Matt's characters (and of course Rand) a lot of the criticism of the changes would have been less. People are willing to accept some changes if you keep their favorite characters interacting well. If we got book true Matt, Perrin and Rand I bet 50% or better of the criticisms you see would be significantly less.
A great example of this is the original Star Trek. There are many examples of poor, or inconsistent episodes in its original run. However people tuned in to see how Kirk, Spock and Bones would interact with each other. How they solved problems together was the best part of the episode. Even if it was against a poorly costumed creature somewhere in southern California.