You could get rid of both Biden and Trump, whoever replaced them would be beholden to the same imperial corporate interests and be just as vile with their policies.
You could do Putin or Zelenskyy in, and another capitalist oligarch would just take their places.
If Netanyahu disappeared tomorrow, Israel has plenty of genocidal politicians ready to fill his boots.
The real world isn't a Marvel movie, there is no single "ultimate bad guy" to rally against. The entire systems of these places need to be overcome.
Only because he's unpopular (to an extent) in Israel; I'm doubtful they'd do the same if he was extremely popular.
He's unpopular on polls and yet him and Likud constantly win elections.
Also don't forget that he's not unpopular for good reasons. He's unpopular because he's getting blame for Oct 7, not making Israelis feel 100% safe since then, and not being genocidal enough in Gaza.
This is a consistent pattern in Israel's political history.
Golda Meir, the then-Prime Minister of Israel and a Ukrainian-American-British Palestinian so-called "socialist" (don't laugh), coerced the US under Nixon into interceding (!!) during the Yom Kippur War under the threat of nuclear force. Despite being an absolutely vile chauvinist who was the most staunch supporter of ethnic cleansing, she was insufficiently bloodthirsty and belligerent for the Israeli voting public, which was a key factor in ending her political career.
Israel is irredeemable. Always has been.