What is the letter F?

Perhaps a P with the face blown off,

Its defeated features sloppily destroyed.

Is F an A who lost a leg,

Because a failed self-sacrifice

What if it's a B that could've done better,

But never willed itself to blossom?

Or is F a deformed C

Who sprouted a radioactive tail?

Sad broken, miserable F,

Your sufferings could've been avoided.