Maybe you’re right but too many of us think the opposite. I would much rather a younger more progressive candidate but Joe Biden has a track record of beating Trump. Biden has done a lot of good things in his first term that I’d want to continue. Even where he hasn’t gone nearly far enough or balanced bad with good, it may be necessary to appeal to the undecideds in the middle. Biden is the only one who can overcome the Trump personality cult
If a big complaint is age, how is that a plus for Sanders? I’m sorry but he missed his chance and now is solidly in “too old for this shit” territory