Capitalism is like a competition that when you win you don't ever get to play again.
Capitalism implies economic agents that follow fair rules. What this ruling shows is that EU haven't forgot what capitalism is all about.
Note, it's not illegal per se. It's not illegal because of a de jure monopoly. It's not even illegal because of the number of users they have. It's illegal because Bing, Yahoo et al are not as relatively successful.
It was the same with browsers. Microsoft were hit for bundling. Apple haven't been though they've done identically the same thing. Why? Because enough people bought Android phones in the EU.
I do find it dubious that, effectively, the primary criteria for illegality is not what the defendant did but what some other actors didn't do. Seems wrong to me.