Roughly speaking, the quality of a politician is ranked on their ability to govern, and on their ability to get votes. One or the other isn't good enough, it has to be both. In Kamala's case she was marginally better than Trump in one, and marginally worse in the other. Democrats must do much better in both.

As for Israel, there is no reason whatsoever to think it would be any better under Harris. Biden was an ideological Zionist who was never going to put real pressure on Israel. Every indication was that Harris would be more of the same. Trump, through no ideology other than serving his own ego, might have actually done better than either of them ever would have.