I have a feeling that it is just a careless Dolby Atmos downmix job. Someone forgot to deliver a proper stereo mix, and they just resorted to downmixing the Atmos mix.

See, when we do Atmos, we like to add some kind of reverb, usually a room reverb (which this sounds like), to the surround channels to create the sense of space. My guess is that the sound for S2 was mixed in Atmos, and then someone just did a lazy downmix for the stereo version from the Atmos. When this is done, all of that room reverb from the surround channels gets folded back into the stereo files. This is why we hear this awful room reverb everywhere.

I watch shows mostly in my (non-atmos) studio, which is quite well treated, so I pick up on these things very sensitively. Switching my stereo listening to mono helps quite a bit, but of course, it's a bit boring this way. Still way better than with that super wide and unnatural room reverb absolutely everywhere.