Large businesses can operate at a loss that small businesses cannot sustain. They do this to strangle out competition. Then, after they’ve established a monopoly or oligopoly, they price gouge customers, reduce COGS resulting in inferior product but higher margins, etc.

I’m surprised that this is news to you. This is basically the foundation of antitrust law. Like, this is extremely common knowledge to the point that it mystifies me that you are not aware of it.