Exactly. This isn't an unsolved problem. It's just that labour power and unions are weak in the US. Businesses get the laws tailored to them, and workers get screwed.
It's fine and normal if a business miscalculates and has to lay people off. But, when that happens it should be obvious to everyone that it wasn't the worker who screwed up, and the worker should have the option to get their job back if things turn around.
What made this video so disgusting wasn't the fact she was losing her job. It's that they tried to pretend that she was being fired because her performance wasn't up to par when that was an obvious lie.