AOC is not a revolutionary politician.
Bernie Sanders is not a revolutionary politician.
They are moderate social democratic politicians, and the fact that they are the "far left" is actually sad.
No, AOC and Sanders aren't going to construct socialism or liberate Palestine or whatever your communist ideal is.
They are of the most right wing, moderate, reformist, and market oriented wing of socialism there is in the United States.
What they will do is make things slightly better for workers, stand up to fascism in a way centrists refuse to do, and maybe pay lip service to a couple of socialist ideas. That's the best America's political system will give us. We have to do the rest.