He won a trophy, his clubs first trophy in the competition for 9 years, i'd say that was successful. Regardless of the level you see it at.
Someone winning aload of trophies in San Marino is also successful. I mean, you're in the game of football to win things. Are you not?
He went from winning nothing, to going to a bigger club and winning nothing, to leaving to join a smaller club and winning a trophy. I'd say that's pretty good going for him.
But as you know from supporting Tottenham, success in competitions doesn't make you a great player. We have players in our team who have won absolutely nothing and potentially probably never will, yet you'd consider at least one of them world class. Would you not?