I'm sorry Flex, but I can't seem to detect the oxymoron in your poem. I'm not sure if the oxymoron is really implicit or if it requires a lateral form of interpretation in order to be seen. Either way, I can't seem to see what could be oxymoronic about your poem. It is a nice poem, though. Really simple and haunting, just like Sadako without all of the TV-related horseshit.
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Scratch that, I've misinterpreted your sentence. My bad.

And yes, being good at writing bad poetry has got to be one of the most polar oxymorons ever.

Your poem isn't all that bad actually. It's simplicity makes it all the more ... somber. Kinda like a pale dude in a plain black suit standing all alone in a graveyard.