That's just stupid, because being anti-competitive is an emergent outcome, rather than anything specific.
Apple is definitely anti-competitive, but they exploited such a ruling so that they can skirt it. Owning a platform that no other entrants are allowed is anti-competitive - whether you're small or large. It's only when you're large that you should become a target to purge via anti-competitive laws. This allows small players to grow, but always face the threat of purging - this makes them wary of trying to take advantage too much, which results in better consumer outcomes.