I'm not good with scores so I'll just explain how I rate Discovery.

Back in the 90s/00s I never understood the hate that some Trek fans had towards a new Trek series. Every time a new series premiered there was a large (or at least very loud) chunk of the fanbase hating on the new series. I liked them all. Some more, some less. But I enjoyed them all for being Star Trek and watched them all countless times. (same goes for LD and SNW)

To put that in perspective:

1. I still don't remember the names of all the bridge officers on Discovery.
2. I only watch Discovery episodes once.

I never felt inclined to rewatch a single episode. It's not that all of them are bad but there's just nothing about them that makes me rewatch them. Especially since 90% of them are embedded in season-long story arcs. (same with Picard, although I do plan to rewatch season 1 and 3 at some point)

At first I liked Discovery for trying something new. I'm not one of those fans who wants a new Trek show to do exactly the same thing that other Trek shows have done before. You need to do new things if you want to keep a franchise alive. But when you do season-long story arcs you need a plan. And Discovery didn't have that. It was quite obvious both in seasons 1 and 2. Season 2 was at least helped by Captain Pike. It's hard to rate those two seasons because there were so many ups and downs. But in total I'd say the first two season were better than the 3rd and 4th seasons.

Season 3 was a chore to watch. Jumping to the future was like jumping the shark for me. There's not nearly enough world-building to make that future interesting -- and how can there be, when there's only 13 episodes and all of them are part of a story arc.

Season 4 was okay. I give them credit for doing something big with non-humanoid and really strange aliens. But this story could have been told in the 23rd century with minimal changes. So why again are they in the future?

In short: Discovery is okay-ish but nothing more.