I think I'll be a little more specific when I say "some parts" of the vocals sound weak.
The parentheses means that part of the line sounds fine.
When you say "But you (can't hide forever)",
In the end of chorus "(Unless you) break it down, and break away" -- It sounds like you're struggling to hit the notes.
All of the vocals after the acoustic part sound off-key. (Maybe it's just me?)
That's all I can really think of. I'm just trying to help, not critizing you or anything.
Great song by the way