The FBI is part of DOJ, which is an executive branch department under Biden's direct authority. If he thinks it's "simply wrong", he can just order them not to do it. He's not limited to "criticizing" it.
Forgetful at the very least. Senile is unnecessarily pejorative. He's an old man who doesnt do much more than make political speeches in public.
> Biden's political experience
His team's political experience is more important, like almost all POTUS before him.