You're trying way too hard with these lengthy answers.
It's "both sides" because it looks like you're trying to show how even-handed you are compared to others because you pair your Trump criticisms with similar attacks against Biden.
But Biden wasn't senile. He still had his marbles, he was just slowed down. Again, he was just fine in the unscripted press conference after the debate when the situation demanded thoughtful, cogent answers rather than the quick back and forth of a debate.
Trump on the other hand is completely around the bend cognitively. He's gone. Just look at him in any public appearance any more, yesterday at a farm policy event he's blathering incoherently about his monuments to himself in DC?
Trump doesn't think, so depending on the opponent(s) in a debate, he can come off as effective to some (never ever to types like you or me because he's spewing nonsense) or a completely unhinged crazed moron (see the debate against Harris in 24).