Stuff and nonsense. The laws are intentionally written in a vague and ambiguous manner, allowing for a great deal of interpretation. Worse, when the EU sees some behavior they wish to target, instead of immediately issuing a rule clarification, warning, or cease and desist, they allow it to continue for several years on end, then suddenly smack the firm with a multi-million or multi-billion dollar fine.
Take the recent case against Apple. Nowhere in the EU's laws does it say "you must allow your competitors to advertise on your own platform". And Apple has been selling music on iTunes -- and barring competitor ads on their own platform -- for twenty years, without a peep from the EU. Suddenly, out of nowhere -- WHAM! Two billion dollar fine.
Face reality. These "antitrust" fines are a cash grab, plain and simple.