The missed distinction, of course, being that companies like Amazon don't send workers to penal colonies for forced labor, don't built walls to prevent them from leaving, and don't kill dissenters.
So not much like an authoritarian dictatorship at all.
Using those three characteristics as necessary conditions for authoritarian dictatorship excludes many actual historical authoritarian dictatorships as well.
Of course, in the context of layoffs, Amazon does effectively deport workers who are on employment-tied visas. In a sense, Amazon is sentencing them to "transportation if you can't find a job in a bad job market."
So not much like an authoritarian dictatorship at all.