Useful answer: Meh. First of all there are some cool storylines and cool characters. There are also utter shit in both regards. My worst gripe is Michael "The Wailer" Burnham. She is by far, like warp 9 far, the most over-emotional character in all of Star trek history. Never mind the fact that she is a star fleet officer who should be somewhat professional, she was also raised by Spock's parents, which is utterly invented out of whole crap for discovery, on Vulcan. If she behaved the way she does on ST:D one tenth of the time she was on Vulcan, they would have put her in an asylum or shipped her back to earth. It is intolerable to watch a star fleet officer bawling in every other episode.

The spore drive. Again, no real connection to the tech of any previous trektech, and never heard of again later. I like the concept actually, but I feel it belongs in another universe, not trek.

The twists. Subverting expectations seems to have been the foundation of the series. While a few surprises are great, discovery seems to hammer the expired equine with twists until it more resembles a gory corkscrew than a horse.

I could go on. I won't.