Yes and the worst excuse of Damon fanatics is that Stefan made Damon drink blood to complete the transition. Stefan is the little brother he doesn't know better and isn't mature enough. Damon on the other hand is and could have stopped it or end himself after becoming a vampire instead of using it as an excuse because the 17 year old girl (Katherine) wanted his 17 year old little brother.
// What did he ever actually do to be an older brother to Stefan, other than torment him at every stage of his life.
I believe Damon used Stefan turning him into a vampire as an excuse to torment him, but the real reason was that he was angry because of Katherine. He just kept using becoming a vampire as the justification.
And he had so many opportunities to end it, but he never did. Instead, he was actually enjoying that life while pretending to be unhappy about turning, using it to guilt-trip Stefan for the rest of his life.
The fact is, Damon was already willing to become a vampire and was willingly drinking Katherine’s blood. Then, all of a sudden, he acts unhappy because his 17-year-old brother who was afraid to be left alone, had been compelled, and was fed vampire blood without his knowledge-completed the transition Stefan was the one Damon, as the older brother, was supposed to protect. He’s just childish and pathetic.