If I help someone and I regret it, does that make me a bad person?

A few things:

I’m in high school now. My teacher has a system where all students are in groups and the performance of the group on quizzes, tests, and homework affects the grade of the group members. This is not any different from other classes one may have had. However, my teacher also has a system where the performance of your group is compared against the performance of other groups, and the highest groups are given the highest grades, from 100 down to 70.

The thing is, the day before the teacher put this system into place, I spent an hour helping a friend not in my group, teaching him the concepts.

Also before this, my middle school had a somewhat informal debate club (informal as in didn’t take up a huge amount of time or dedication, just a place to debate). We elected officers, and I was in the running with many of my friends. I voted for my friends, just because they were my friends. There were five officers and I ended up being sixth place by one vote. I felt bad, but not too bad because I had still helped a friend out for his benefit, not my own.

When I told my father about both these things, he reprimanded me and said what I did was a bad move.

I ask Fluther for collective wisdom: What do you think? Was I wrong to help people while hindering myself?