Conjecture.

Laws in the EU are far less strict and precise to begin with than US laws that you might be used to. The EU competition commission has wideranging powers to fine almost any company as it sees fit for even no reason at all. But to maintain its own existence, the public (voters -> MEPs) need to think it's doing a good job. A good way to do that is to fine companies voters think are evil.

I just meant that people in eu loves apple. That's certainly not true everywhere. The market share definitely doesn't show that.

The anti-trust legislation used to be applied much more widely in the US, but that has changed (and we see a market with a lot of bully monopolists because of this).

It doesn't really come down to if the law is precise or not, but how it is applied.