Grading This Poem

I think I will give this poem a C

Its meter is flawed, it has dubious rhymes  

Perhaps I’d do better if I felt more free

My mind’s clogged with goop in these god-awful times 

To write an “A” poem, that’s no easy task 

I lack noble sentiments that could fill the bill 

So why even bother, you probably ask 

Especially of someone bereft of much skill  

I mostly write poems to please the teacher 

The best way to do this, a verse that’s funny

Or maybe an ode to an alien creature 

Gobbling infants by the brook on a morn that’s sunny

Too frightful, this author is lyrically deaf
I've changed my mind, this poem gets an F