Nina? I am not very good at critique.
I feel unqualified, but I liked your approach on this one, so in that spirit, please trust that my opinion is just that, and nothing more, k?
"Unheralded black waves capsize over me"
I'd have a put a comma behind "Unheralded", and lost one of two words that follow, either capsize, or "over" me, I'd probably opt for capsize as an edit, since your next word--
"capturing" is close in etymology. I'd probably lose the "over me"...
"capturing me as their prisoner of isolation."
that is good but can be better--capturing me as their prisoner is more redundancy and the following "isolation" is just more of the same.
"Tendrils of coiling seaweed--"
[i]I'd say the same of this, but you could reverse it and make it work,
"Coiling seaweed tendrilling"
(See how that loses the need for the line of "lock me down"?)
Which would be better, IMHO, since I think an apt description of drowning, suffocation, or whatever your choice might be might be a more apt description.
lock me down
tying me to a place where
reality collides into dreams
"reality collides into dreams"
I might just be basic and say
"reality collides with dreams"
and make it more personally case-specific.
but? smile, it's your poem, your reflection and fight me on it, since it is your expression...but if you do, let it lead to
"pain smothers happiness
weakness conquers strength."
Now there, we'd quibble.
But again, this is yours, and I'd like to see a more indepth explanation of how you come to that conclusion, because the next line is a beaut:
"Releasing me only to sieze me once more
at my first breathe of air."
I like this. I do feel you have more to say however, and would love to see you utilize the language to exemplify the feeling you express in the final line.
You've got what they call "good bones", and it could be a terrific example of hero's journey with just a bit of tweaking.
I'm no expert.
And I write godawful poetry m'self, so?
go with your feeling, always, but I'd adore seeing this re-written with stretch and emotion.
Thanks for the opportunity to read, and express myself freely in critique.