I noticed that in the videos, too. It has in-game gamma settings, so it's possible that the people recording the video have it set too bright, or brighter than the other versions. In my experience, I have the gamma set properly and the black levels are good.
I'm just an hour or two in (playing docked), and haven't noticed big resolution drops. If they're there, they're likely happening in the midst of a lot of action and movement, but that screenshot is pretty representative of how the game looks. In terms of current-gen Switch ports, I'd compare the image quality to single-player Warframe rather than Doom or Wolfenstein; the latter two, at least to me, were noticeably softer looking.