Hmm, I guess I understand your points. There are some people who really are just lazy, but there are also those who work really hard, but it just doesn't translate to grades. Grades shouldn't be what's important, but in our setting, they kind of are, and I feel bad being able to breeze by while people who actually deserve to do well are having such a hard time. It feels like really grave injustice, but as they say, life is unfair. Sigh.

I did consider at some time that I was letting them become dependent on me, and I told myself that they would be able to find other sources or figure it out without me. I have become less available than before, like spending less time online where people could conveniently pm me to ask about some topic. I guess they do seem less needy despite still struggling, but I kind of feel less human(?) or something, not caring as much.
(Last year it got pretty bad and cheating out of desperartion / laziness was quite rampant, that's why I wanted to teach them so they wouldn't resort to it. Also so that those who actually studied wouldn't be at a disadvantage to those who cheated.)

About the tutoring thing, I think they are usually for lower maths, and a lot of my friends are actually tutors themselves for high school or freshman students. No one really tutors for higher math. As for asking the teachers, some of my friends did go for consultation recently and said the teacher (who everyone thinks is an *** - I don't) was no help. He expects them to figure certain stuff out for themselves, when the whole point of them consulting is that they can't figure out that part.