They took over by winning the election. And they repudiated further elections because the response wasn’t an attempt to work with a clearly moderated Hamas in a post war setting, but to blockade them and conduct assassinations and air strikes. When Israel demonstrates a clear physical veto on Palestinian elections then any election result is moot. You want to paint them as bloodthirsty warlords but that just ain’t the story. As for controlling aid, so does every other government in the world.