Eh. I thought the human scenes worked in establishing a “why” to all the major plot beats. Especially in the third act. Without the Apex investigation gang, there’s no direct connection for viewers as to why Godzilla is attacking cities. And the Monarch team is critical to why Godzilla hasn’t gone after Kong yet and why he’s going after him now. They were necessary and not so egregiously awful they hurt the entire film.
Although, after this and Enola Holmes, I’m officially of the mindset that Millie Bobbie Brown can’t actually act. She just works as Eleven because that character is supposed to stilted, weird, and uncomfortable.