Antitrust does not require a monopoly, it just requires enough of a market dominance that hurting the market is feasible for you, and then exploiting this posit

Antitrust does not require a monopoly, it just requires enough of a market dominance that hurting the market is feasible for you, and then exploiting this position to actually hurt the market. Basically, all you have to do, is hurt the market in noticeable ways. The sole goal of antitrust laws is keeping the market healthy. They're not fair and have almost no rules attached to them.