They're saying that google services are dominant and anticompetitive, but not dominant BECAUSE they're anticompetitive.
Even if they were playing fair with competitors, they would still be #1 because they were that good. But because they weren't okay with giving competitors a fair chance, they resorted to anticompetitive practices that hurt consumers, and now this ruling is going to hurt google in return. They could have played nice and everything would have been better for everyone, but they didn't so here we are