If the spirit of the antitrust law is to protect consumers from enshittification, then yes.
But as written to the letter of the law, no, as this would not create a monopoly. More consolidation yes, but a monopoly technically not.
Given that the whole point is to prevent consolidation that is to the detriment of consumers, well, yeah.
Given that the whole point is to prevent consolidation that is to the detriment of consumers, well, yeah.