finding it difficult to mount a resistance, eventhough they know they should.

A major part of it is because those who do mount any kind of actual resistance that has any potential for being effective, they get murdered and disappeared. E.g. Black Panthers, or the original leadership of BLM before it was coopted by liberals. Any genuine leftism in the US has been effectively eradicated by outright murder, intense anticommunist propaganda campaigns (targeting every segment of society from elementary schools to popular media control to even workers unions themselves), and direct infiltration and dismantling of leftist organizations of any size. This society is practically built around a pathological individualism that neuters any potential for mass action. Our culture has been cultivated to only accept rightward expressions of political dissatisfaction, with no room for or even basic understanding of leftwing organization.