Yeah, Chandler’s character is a big part of the problem. I’ve seen him called a Gary Stu and while I generally hate that term, here I am forced to agree. Having him be always right sucks all the tension out of the human parts of the film. No one grows or learns, they just wait for him to tell them what to do. The problem isn’t that it’s dumb, the problem is it’s boring. Dumb can still be entertaining. Boring not so much.
Re the spoiler (ish) stuff
It hit me the minute the character I call Mr. Hollowworld starts talking about how he was right about a hollow world and the repeats it like three more times, followed by the sub getting sucked through a hollow world tunnel and ending up in what I was surprised no one actually called “lost Seatopia,” then finally they trigger a nuclear bomb, which of course is the catalyst for Seatopia sending Megalon out. I guess it was just me but it was like getting repeatedly hit in the face with a big rubber cockroach...
The film could have really used the other characters to have solved some of the problems because like you said, it gets boring. Those 4 issues in the first godzilla scene could have all been done by 4 different characters, it would have probably helped a little bit.
On your spoiler, you are right, I forgot that the monster is from an underground world so they could be hinting at him arriving GvK which could be cool, I've always liked the design.
