From a certain pov, Harry wasn´t wrong: Snape WANTED to help Draco, just not the way Harry thought and he was also a spy of the order. :) I guess Harry thought about all this years after.

Personally, I consider it damage control, but I suppose it also counts as help from a certain point of view.

I reread that passage and found this gem, too:

It is an act that is crucial to success, Draco!’ said Snape. ‘Where do you think I would have been all these years, if I had not known how to act? (HBP, chapter 15)

He's a complex and misunderstood person, who I want to hug and kick at the same time. :) But imo, not everything that has happened in his family is his fault and he can be a really good leader when he isn´t in one of his self destructive phases.

Rooting for Magneto is exactly being “want to hug and kick at the same time“

Maybe he can be a good leader sometimes, but most of the time he ended up being an abusive/manipulative shitty leader or just ditch his followers or was ditched by his followers who had enough courage to called out his shit.

About family issues, yeah not all his fault, but many of them ARE. And he always made things worse even it could be easily avoided with a little care...  but he couldn’t help because he’s such a mess.