if u wish that some of harry's deeds can be reversed to make good for all, what will it be??

Well this is how stories work, don't they? So I'm not really feeling that Harry should have not made this and this decision and I'm not keen on blaming my plot-preferences on Harry's hasty or not reactions to a certain situation either. And I'd even say it's not decisions, but in general some given characteristics of Harry's that always twist happenings into the written outcome. Like, if Harry wasn't as stubborn as a freaking mule Sirius would be still alive. Same goes for his I'm-Harry-Awesome-Potter complexion which always makes him wanna save the world all on his own. The happy end absolves him, though, after all it'll be Harry Awesome Potter who saves the world from Tom Snakenose Riddle.