The poll found 50% of Democrats approve of how Biden has navigated the conflict while 46% disapprove — and the two groups diverge substantially in their views of U.S. support for Israel. Biden’s support on the issue among Democrats is down slightly from August, as an AP-NORC poll conducted then found that 57% of Democrats approved of his handling of the conflict and 40% disapproved.
As long as the better candidate doesn’t manage to top 40% consistently, there’s no real pressure for any change. If most people are only willing to invest the absolute minimum (or less) in time and energy in the democratic process, that makes it extremely easy for others to get in power. The US has a shit system but the easiest first step would be a popular majority within the own party.