I'm just annoyed Biden isn't taken more seriously.
Biden has high name recognition and consistently bad poll numbers in presidential polling, so perception of him is already baked in and not in a good way. In 2008 he got 1% in the Iowa Caucuses and then dropped out. There isn't a reason to take him seriously.
Biden's name recognition is a lot lower than Hillary's. And in voter familiarity with Hillary and him, the disparity is even wider. Also, there's a better explanation for his poor polling (both in 2008 and now) than what people think of Biden himself, e.g in 2008, his competition. In 2014, his boss and his balls.