Scylla wanted her way, which would lead to Earth going through some pretty serious sh**.

Of course, Godzilla doesn't like that.

Also she was disobeying him left and right.

I see...

Cause she a dumb bitch!!!!! (JK, what he said ^^)

I think she was preparing to give birth. In the prequel, Godzilla x Kong: The Hunted, this is suggested by Bernie. And yeah, she’s smarter than that, so yeah. And before this, she already cut in to his path to India, to eat nuclear energey. What else would she do with such energey? Also after disrespecting Goji many times, she wouldn’t have any other choice. By now, Goji is pissed, and wont take an apology for an answer. Rome was the last straw.

She disobeyed him.

Challenged more than once.

She wanted to do her own thing.

And she caused too much damage when feeding on nuclear energy, which includes her releasing some kind of gas that allows her to eat the nuclear energy, and too much of this threatened to damage the atmosphere.