One of the biggest hitters for people in terms of disappointment with the film is basically how the marketing lied to us. Despite what all the trailers said, this was not a dark Godzilla movie with endearing characters and settings with a "Man vs Nature" message. This was a Mutos movie with the military trying to kill them, following your typical military tough guy trying to get back to his family (kinda similiar to that one military character from Transformers 1 trying to get back to his wife and kid, only with robots and less focus), and Godzilla just being there to give us cool fights/shots.
So with that in mind, it begs the question: would this movie have been better with just Godzilla as the threat of the film and no Mutos, no monsters to fight, just Godzilla and the beautiful man vs nature plot we were promised? I'd like to say yes, it would be weird to have Godzilla
- Lack of Godzilla (He's the main focus, literally impossible to not show a lot of him. And considering the amount Gareth shows the Mutos and Godzilla combined in the version we got, I think it's safe to say we also wouldn't be overwhelmed with the amount of his appearances.)
- No Man vs. Nature Conflict/Godzilla = Force of Nature, not a Savior (It's Godzilla vs. Humans. With that in mind, he wouldn't be a savior and the position of Godzilla would be forced to go back to the way the 1954 movie portrayed him; a force of nature, and symbolism for nuclear destruction.)
- Etc. (I could go on, but then we wouldn't have much to discuss about if I blabber on about everything, huh?)
This is all strongly opinion based, so as far as I know, you got exactly what you wanted. And no, I'm not saying the movie is bad. In my book, it's an 8/10. But going back and watching the trailers again, it depresses me that I never got that film; it feels like I'm still waiting for it. So yeah, I think it's the false advertising's fault. But that's not what this discussion is about.
Bottom Line: If Godzilla was alone in this film, would the movie have been better? Or at least, more like the movie we were promised?
Also, sidenote, this is talking about the quality of the film overall, not whether audience members would've seen it regardless. Would it have been a better film, not a better success.
Yes, we would have to sacrifice the monster fights, but I think it's a small price to pay for the glorious film the trailers showed us. And again, if you don't agree, a simple "I disagree, the movie we got was perfect" will do.