I'm going to make my classmate fail
Wouldn't you feel bad if they were to fail the class?
No, if anything I would celebrate his failure
It's understandable to not like a classmate, but its wrong to sabotage them for your own selfish reasons. They could end up getting in a lot of trouble from failing.
That's not my problem. I just don't care.
Your classmates are your peers and eventually will become your friends. It's best not to set them up for failure.