DS9 is the kind of show that might be easier for an adult to grasp and appreciate.
When DS9 originally aired, I couldn't get into it; maybe because I was young and an idiot back then, and also because it aired contemporaneously with TNG. It was so different than TNG, and DS9 was not what I expected of a Star Trek show.
I didn't become a DS9 fan until many years after it ended its original run. By then, I had a more cynical view of things and the times were different as well. When I watched the show when it was in reruns, I liked it from the outset, from season 1 on wards.
I didn't think the early seasons were boring or anything of the kind. One of my favorite season 1 episodes is "Progress". There might not always be a happy ending. DS9's stories and characters, especially Kira and Odo, are more engaging and at a more deeper level that I didn't get with TNG, and probably not with TOS either.
I am curious how a scifi fan (a youngster and an adult) but a newbie to the Star Trek franchise, without any Trek baggage, would react to watching DS9 today for the first time.
Unfortunately I think possibly an older person might, big might like the show,
But a younger person, or teen, I just couldn't see it.
Limited "action" scenes and what there is are surely not as fabulous as the GCI now that looks blurry and choppy, you know, the stuff everyone oohs and aahs over now.
Also, "relationships" ????
How can we know what the pair did unless we get to watch them doing it?
No nudity?
Is this a show for little kids?
Sadly I honestly think that a show like this, more about dialogue and 'human' interactions and emotions may never be big again.
I don't watch hardly any modern TV but when I happen to stupidly pause the channel on a newer show, I'm seeing some dialogue, but it seems trite and only applicable to the characters on the show, or I see gratuitous 'nudity' as much as can show on over the air USA TV. Gratuitous in that about 90+% is purely about sex.
I see over the top blood and gore too.
I think thought provoking shows that can be duscussed out side the context of the show itself are mostly if not completly gone.