I'm the original loser
Why do you think that you're a loser?
Our group is ranked 3rd from bottom of the class
Don't be so negative and hard on yourself. You shouldn't call yourself a loser because you are better than that. Remember, there is nowhere to climb now but up.
Sucks, so I'm going down.
Not everyone can be at the top. If you're doing your best, that's all your teacher can ask for. But if you think a tutor could help you, consider working with one to improve your place in the class.