At the end of the day, the show is very unique in terms of how it was shot. The cinematics and choice of scenes created this immersion of a unique scenario. For example, what do you do if you are stuck in a grocery store during a zombie outbreak with no weapons do you give up the goods or try to fight? I can see why people didn't like this show but here is the run down
Pros:
-Realistic(for the most part) characters you may enjoy die unexpectedly
-The survivors don't easily headshot the zombies(not everyone is a marksman cod zombies player)
-Decision making is not always right, but that's what makes it feel real
-lowkey kinda scary with a lot of tension
Cons:
-Character development lacks(if you're into that
-*SPOILERS* the evil kids in the school is ridiculous
-Season 2 towards the end was not as good.