The Goal?

What is the goal of english? To convey a message?
If so, what if i find using ambiguous and long-winded metaphors unhelpful in achieving this goal, should I still be forced to write in such a style that I pretentious and unnatural?
I'm currently taking grade 12 U english and this is the dilemma I am faced with. My teacher is into all that poetic and romantic sounding stuff. Even to the point that form overprioritizes function (at least in my perspective). Often-times, the text is just bloated with literary devices to the point that it's just impractical and hard to understand. It would only appeal to those librarian-old-lady types (which she happens to be).
Does the problem lay in the fact my english is vastly inferior, being unable to intuitively use fancy metaphors to convey my thoughts?  Does the problem lay in the teacher?  What does the education system expect of students at this level? I've had english teachers in the past and none of them sounded so phoney and pompous as she... (don't get me wrong she's very nice)

Your teacher needs to be loved gently.

It seems you won't be a virgin for long.

Pithiness is a virtue.

>>1
Personally I think undisciplined and profligate writing is probably worse than something which is riddled with grammatical and spelling errors: while being equally incomprehensible it's also obnoxious, and indicates a half-assed ATTEMPT at sounding intelligent.

Just because your sentences don't explode with imagery does not mean your writing cannot be incisive, dynamic, and engaging. There are plenty of ways to catch and hold a reader's attention without deviating into "MY LOVE IS LIKE THE RED RED ROSE" territory. Having a sense of humour helps, brevity being the soul of wit and all.

Of course, you'll have to learn variety. An entire essay, paper, or dissertation consisting entirely of SUBJECT VERB OBJECT sentences can become very, very tiring.

it is hurtful to put writing into a box

the class lesson is just one expression of many

you are more patient than i if u can bear through it,
i freakin quit and went in a complete other direction.

have you been updated for tetanus recently?

>>1,4
PROTIP for variety: Read George Zimmer biographlets.