I don't see how what conservatives say has to do with reality.
Biden has been "senile" and "too old" for years now, during which time we've had a functioning Biden administration.
The Trump admin was limp, chronically understaffed, weak, ineffectual. That's what they're pretending is better than Biden. Conservatives don't even care about senility so if you hear them rag on Biden and think they're right, you're not understanding what they're really saying.
What I don't understand about the handlers thing is that when I watch other famous people walking and talking: I see their handlers steer them, give them signals, whisper names in their ear. And you know what? Celebrities in their prime look awkward all the time. People who have nothing to worry about but their craft and being famous screw up all the time.