I've seen some cherry picked clips of Biden and it wasn't a great look, but he's not Trump and he's not the Republican party
so even though Biden looks like a grandpa that should be enjoying retirement, to me a second term of Biden means 4 years of of the GOP not controlling Supreme Court nominations, a President that supports Ukraine, federal appointments that don't sabotage their agency (Dejoy), someone that values country over self in times of crisis (COVID), etc
and hopefully, after a 2nd term of Biden, Trump & MAGA will be weakened to the point of no longer having an outsized influence over the Republican party