Petrichor SquirrelThe very fact that management doesn't think you should unionize should be taken as compelling evidence that unionization is in your best interests.
I have been in the workforce for 8 years and my grand insight into capitalism is that the interests of management and workers are in inexorable conflict. Management needs workers more than workers need managers, but managers can hurt workers more than workers can hurt management. These are not the conditions for a happy and harmonious society.