I don't hate it. The story is generic, the FPS gameplay has been just about the same since I don't know when, probably late 90s when you could actually aim at stuff unlike you did (or rather, couldn't) in Doom...
Don't appreciate all the biblical references, otherwise it's just as good as anything.
Also I don't like the plot, but that kind of qualifies as my own damn problem. Not a big fan of having generic bad guys with no redeeming qualities, aka Flood and similar things. It enforces idiotic good vs evil views and makes the job way too easy for the writers and what not. They don't need to manipulate you to have actual emotions towards the game and the characters, they just paint one group black and stick some spikes/tentacles on it and say "HERE ARE THE BAD GUYS" and that's it.