This isn’t a new problem.  Many people watch cinematic items in brightly lit rooms, creating this problem.  I side with him, but only barely.

(No, I don’t watch the show…  can’t justify another pay service in the house!)

“Game of thrones” cinematographer Fabian Wagner says HBO’s compression was to blame for the dark, blurry picture during Sunday’s episode, not him or director Miguel Sapochnik. The good news? It will look better once you re-watch.

Source: ‘Game of Thrones’ cinematographer addresses ‘The Long Night’: ‘I know it wasn’t too dark’