In the EU how successful the abuse is does somewhat matter. The EU doesn't like it when you have two monopolies and use one to reinforce the other. They're generally fine with leveraging one to get an advantage in another market space as long as you don't fall in the above category, ie as long as you aren't a significant portion of the market.

I do sort of agree in this case because it creates more competition in the market (ie Chrome vs Edge) which is healthy.