The problem is that the EU is not actually attempting to regulate anti-competitive conduct in the market. That's why the market cap is required. They're fine with the exact same type of conduct below the cap so how can you really say it's actually anti-competitive?You say that based on??
"Competition law is the field of law that promotes or seeks to maintain market competition by regulating anti-competitive conduct by companies."
Literally the first sentence from Wikipedia.
Competition law - Wikipedia
en.wikipedia.org