Too dam dark unwatchable

I think there might be a problem with your screen. There was no problem with mine.

Looks perfect here.

I had the same problem for the night scenes but was watching from on an older TV. Was thinking couldn't they shoot day for night?

The night scenes and what I took to be scenes happening in caves or underground were unwatchable on my Sony TV that has never had a problem with any other programmes. Net result is I stopped watching it was that bad.

That's a new trick to hide the cheap sets.

Looks fine here, check your screen. New season is plenty bright and everything is clearly visible as well.

Enable HDR.

Same here, I have to ramp up brightness to max. Also sound volume is LOW. Other show/movies from Prime don't have this issue, it's really awful.