SPOILERS
the fucking ending man
for no appreciable reason, they dump the squid. (it wouldn't have taken THAT much more screen time, especially when they had all these retarded ten-minute slo-mo fighting and sex scenes). they replace it with something that makes NO SENSE WHATSOEVER (the whole point of the squid is that the russians blame "aliens" instead of americans, and americans blame "aliens" instead of russians; there is NO FUCKING WAY the russians would not blame the USA for the american superweapon dr. manhattan getting out of control.)
THEN, they ruin one of the absolute greatest things about the book: the timing. it's so awesome how veidt does the whole "I'm a supervillain and here is my plan" speech, and then the watchmen are like "we're gonna stop you" and he's like "idiots, am I a supervillain? I did it fifteen minutes ago" and then it cuts to NYC with corpses everywhere and NEVER SHOWS the actual destruction. but they couldn't restrain themselves in the movie. They had to show the destruction and completely ruin what is maybe my favorite individual part of the book.
and THEN they keep rolling film. all of us were like "um what? stop. what's going on?" and nite owl KEEPS TALKING and then eventually punches veidt and walks away and we were like, "that served no purpose."