If United is a small club, it is successful. But United is a big club and spending 400m under Jose. Europa League, League Cup? It is the trophy most big club just don't give a damn.
If it is true, you need to ask your manager why they bought so many players with high price but no one better than City? Maybe he just can't get the best out of his player and made his player look weaker but actually they are not.
btw, United got beaten by a lot of teams who have weaker players in every single position, Derby, walford,Sevilla...etc
If beating City is so-called success ,clearly , he bring more failure than success.