1. I'd point to a great example from one of our current justices in this regard: https://www.theguardian.com/law/2017/mar/23/neil-gorsuch-sup...
No-one's forcing Apple customers to go outside the walled garden. They can still source their apps from only the Apple App Store.
That's not just an EU problem though. It seems to be well established (and perhaps worse?) in many places.
Companies are designed and allowed, by characters, to operate within the scope of whats good for society. If it harms the public good then it needs to be reigned in. I have no illusions that companies have the same standing and rights as living beings do. They are lifeless entities meant to be subject to the will of people.
In the same way Right to Repair, Minimum Wage, and Disciminatory hiring affects the freedom of running a business, sure. Unfortunately, rules are written in blood and this is happening because other businesses at this point abused the point of labor or customer satisfaction and needed to get dinged for it.
In this case, Blame Microsoft, I guess. Heck, even Google. we already know the result of a closed system abusing its platform and large share to make its product worse. I'm glad we're actually jumping into this before it's too late (like we usually do).
This actively reduces freedom, the freedom of running your business. You just don't care about it.
If you don't like walled gardens you can just not use them (I certainly never bought anything Apple for this very reason), there's no need to infringe on the freedom of everyone else who wants to use walled gardens.
The EU is in general becoming increasingly less free, thanks to barely elected bureaucrats who line up their pockets with sponsors money.