Alright, here we go.
The first section feels - admittedly - very cliché. Scientists get berated by greedy corporate-representative. Not a great start. However, the next section definitely peaked my interest. It's definitely a new take on the Kaiju topic and the swapping of roles is great. Humans are the monsters, for once. It might be me being a Furry, but I can easily identify with the creature which you are humanizing to a degree. Its helplessness is portrayed plain and claustrophobic, especially since it's not even clear whether the trapped intelligence is only a side-product or purposefully implemented.
Your continuous implementation of "And then there was light" gives a nice structure to the whole piece, always letting something else follow. There are also little pearls of prose in there, like your usage of "it felt… it felt" or "singing rainforests". The end is also harsh and quite fitting with the narrative, especially the concluding lines.
It's dark, it's infuriating, it's +1.
All the best
- Nylo