Well, if you think like that nobody, excluding Regina, Rumpel/Gold, Emma, August/Pin and Henry can do no wrong … That would be kind of boring, though.
Of course all the wrong things done by David – and other cursed characters – is somehow fault of the curse, but in the end, when the curse is broken, they’ll have to live with the knowledge of things they did. Some may not be forgiven easily. I don’t think this will be an issue with David&MM, just saying.
Anyone else think that David’s gone a few steps to being more Charming between The Return to The Stranger? He was really nice trying to help Regina (it’s not his fault he doesn’t know of her doing …) and then seeing how hurt she was – even though she acted it – and staying for her. It was kind of chivalrous. And when he talked to MM in The Return he understood that she was right with the whole “That’s what makes it all so sad.” He’s finally growing up and becoming more like himself, even though he’s still a long way to being completely so.