More accurately, you're including whatever you want, wherever you want. Double or triple standards across every series, just as long as Discovery comes in last. Through an incredible display of mental gymnastics, you've managed to convince yourself that Discovery is the only show to regularly feature undeveloped background characters and other Treks had up to 20 "main" characters while Discovery still only has 6.
All you had to say was that Discovery's main cast bores you. No one could say you are wrong about how you feel about them. Instead you pretended you were being objectively analytical, and came up with one of the most ridiculous and laughable arguments this forum has ever seen.
Anyone who is being truly objective and honest will be able to tell you who the main characters are after watching a season, even if they hate those characters. If you asked them to expand that list, they would include people like Seska, Dukat, and Admiral Cornwell, but they still wouldn't include recurring background characters like Ayala, Morn, Robot Person, or Lady With Messed Up Eye.
You pretending DSC's "so called main characters" are overshadowed by its background characters is incredibly, transparently dishonest.
Your argument that recurring background characters in other series are dissimilar, because they technically don't appear in "every episode" like DSC's, is grasping at straws. It's also factually incorrect because DSC's haven't appeared in every episode either, and the premise that a background character must be absent some episodes is absurd to begin with.
Your argument that DSC has a "shortage" of developed characters is, again, factually incorrect, and, again, the premise is absurd. A show's success is not related to the number of main characters.
This is all true regardless of your overall opinion of any of these shows or their characters.
I've received concessions already that Discovery has fewer central characters than the other trek series. The excuse was because they have fewer episodes in a season. Memory alpha quotes fewer central characters than any others. That's objective enough for me.
The background characters are more noticeable like the Robot person. Who puts so much work into a background character and not use them? What a waste of money.
You want objective, here's objective. From last weeks episode

Every single character on the bridge in this scene does not have an important role in the story except the captain. The only episode I can recall a fully manned bridge this happening is in Descent Part 2 . In that case Beverly was the captain and she had a skeleton crew. This isn't even a skeleton crew, look how many people are ignored.
Obviously there is some correlation between number of characters and ratings. If there were 0 actors there'd be no show at all. There are other variables at work such as quality of acting, which stinks too. Ignoring the character shortage is just dishonest, I think people can see what you're doing here. I can pretty much guarantee you that they will have to bring on new actors in this series or use the ones they are currently ignoring to improve the ratings.