Planet of the Monsters first impressions: Multiple Godzillas, symbolism and more

Chris
AdminSpaceGodzillaJan-18-2018 4:32 PMSo, I finally got some time to sit down and watch Godzilla: Planet of the Monsters on Netflix and after my initial viewing, I am left with some questions.
No, this is not a review, although I did enjoy the entire film, no this topic is more so concerning the new Godzilla lore established by this anime. Please correct me if I misunderstood anything:
So, first off Godzilla's atomic breath was changed again and Godzilla now possesses the ability to generate some kind of atomic shield? This shield is also generated by resonating sounds from within Godzilla which vibrate to a specific frequency. This frequency, when interrupted can be adjusted as well it seemed by Godzilla to adapt and generate a new shield around his body.
I didn't quite understand the concept but hey it's anime so I could suspend logic for an hour and enjoy the film.
Secondly, the original Godzilla somehow laid dormant under the Earth's crust for 20,000 years, growing continuously for that entire length of time - making Godzilla over 300 meters tall and weighing over 25,000 tons I believe? So - this also means there were more than one Godzilla and that when at a smaller size, Godzilla CAN be killed. But once he reaches the mass he did, he is no longer vulnurable?
I didn't quite understand how and why the OG Gojira was awoken upon the smaller Godzilla being destroyed. I also didn't understand how the OG happened to surface exactly where the previous Godzilla died.
What I took away from the ending of Planet of the Monsters was that Godzilla represented the natural force of destruction and that no Human interference can stop Godzilla from existing and doing what he does best - which is to destroy.
It seemed to me like all hope was really lost for the Human race and that Godzilla was put in place by nature to eradicate Mankind following its poor treatment of planet Earth.
It's a pretty summed up notion but do you guys agree with my interpretation? Or is there some deeper meaning I missed on my first viewing? Let me know in the replies below! I plan on re-watching it at least 2 more times to see what else I missed.
Predator: Badlands - coming November 7th, 2025