You have to just turn your brain off to watch this if you want to enjoy it. Fighting over a shitty prison with wire fences? I mean really? Why aren't these stupid f**ks on a boat off the coast? Still I'll watch anything with zombies.
f**k you can be dumb. How about - how the f**k are people rising from the dead? How about - how the f**k did zombies with weapons of broken teeth defeat fully armoured and fully armed armies? Tanks? Battleships? Fighter jets?
Suspension of disbelief has to be given to even give it a chance.
As for a boat off the coast - one of the worst plans imaginable. To have a good chance of finding a good boat you'd have to go to a city port - and to survive on a boat you'd have to go back to a city every few weeks to stock up big. Good luck with that. All the cities are overrun.