Of any of the shows, I think the overall outlook of Strange New Worlds comes the closest to depicting space as dangerous and full of "monsters," instead of species to be understood and reasoned with.I kind of want to see this argument now.
Anyone who does, you can't have it all rely on "Under the Cloak of War".
La'an lays it out when she describes the Gorn in season 1's "Memento Mori."
LA'AN: "The Federation teaches that if we can find a way to empathize with an enemy, then they can one day become our friends. They're wrong. Some things in this universe are just plain evil. Have you ever seen eyes that are both dead and hungry at the same time? To them, humans are just walking feed bags of flesh, bone, and jelly. The Gorn trigger a primitive, ancient terror in warm-blooded species. We are prey. And when they hunt, they're unrelenting. The truth is, plenty of people have seen the Gorn. They just don't live long enough to talk about it."
And even though they admittedly use Spock's dialogue in "Balance of Terror" as the springboard to do it, "A Quality of Mercy" basically revolves around the idea that a civilized approach which offers mercy and seeks peace and understanding with the Romulans is both naive and wrong. That sometimes the right choice is killing your retreating enemies for the greater good.
If you then throw in that in season 2 Strange New Worlds argues the Federation practices systemic segregation and discrimination of the genetically engineered, where Deep Space Nine's view is (in my opinion) much more even-handed in how it deals with the problems around the issue, I think it presents a much more muddled view of how positive the Federation and Starfleet are.