The vocal work was definitely the highlight of this submission. The lyrics, effects, performance, it was all *chef's kiss* excellent. I read your "ramblings", and I'm glad you were able to share something so personal with us random internet strangers, that's not easy! I enjoyed this piece!
My only real critique is that I got more of a "spooky evil cave" vibe than underwater from the sound design. Maybe take away a little bit of reverb and throw some low pass filters on some of your higher frequency sounds, especially in the beginning. Then you could take the filters away in the final moments of the piece where the drums come in at 2:52 and have a big swell of sound. Don't change a thing about the vocals tho :)
Thank you so much for sharing, great work!