The rhyme scheme in this one is well-done, with the occasional simple rhyme and some more complex ones. However, you should really go over the piece before submitting it, because there are a few grammar errors, such as "grude" instead of "grudge" and "obsurd" instead of "absurd". Even though it's nit-picky, it takes away from the piece.
I enjoyed the message behind the poem. It's very true you should have a voice and make it heard, despite oppression or depression. If you don't, the world will take you.