While trying to create a fun experience for the Zombie genre enthusiasts, Snyder forgot to place in basic logical and common sensical things. One can easily find out flaws in every scene and most of the questions will be unanswered till the end.
There are just too many plot holes. Why would there be such an easy gateway into the city wouldn't the clever alpha zombies figure that out. Plus the wall was hardly 20ft high, which can easily be jumped over by making steps somehow, am sure the elevator using zombies can figure this out. Why won't they get into the city with a chopper there's hardly anyone stoping them. Why won't the evil billionaire get the zombie sample from the first moment of encounter with them, i mean they appear pretty close to the gate, why would anyone pretend stealing money just to do a side mission while there are so many ways of doing it. There could have been interesting plot lines along zombies being able to reproduce, but that thought was just for some stupid anger issue. Why were the people taken by the alphas were kept alive like that while they can just be turn into zombies right there and then. It's like they were kept alive just to advance the plot. There are many such questions and plot holes.
Many obvious connotations are repeatedly emphasised as if some dumb person is watching it.
All these flaws can somehow be overlooked if the fight sequences had some innovations and eye-catching scenes. Rather there are just same old compilations of insanely accurate headshots that are probably in every zombie movies.
Also, there are multiple attempts of forceful comedic lines but weren't executed that properly.
In the end, watch it just for the sake of it without using much of your brain, you might have a decent time.