Of course Atletico are playing like nasty feckers and Simeone is encouraging that. Yet, people forget that they don't even have half the budget of City and frequently lose their best players. Just in the last three seasons they lost 5 starters, while maintaining balanced transfer spending: Griezmann, Hernandez, Rodri, Partey and Trippier.
The fact that this was a contest at all, shows how good he is. Expectations are just way off in regards to Atletico. The embarrassing part is not, that they do that against City in the CL, but that they play the same way against bottom sides in la liga.
United are in a very different situation and shouldn't need someone like Simeone to compete with the top clubs in the world.