I understand that Biden's consistency in the polls is distressing to some in the primary, but you're all going to be grateful for it come next year once the primaries are over quickly and Biden is coasting to an easy win.
He's not polling as well for the primary or general election as Hillary was.
Hillary was virtually unchallenged at this point in 2015 with Bernie having very little name recognition. Unlike this time, when 99% know him.
If anything he's polling better than her considering the number of people in the race. Even Trump didn't reach this high in 2015.