What time frame are you looking at though? From when they got their investment? If so, that's a bit harsh. They're not going to go from where they were to challenging for major honours overnight. From when they made it into the CL and could start attracting the same sort of players, Utd, Chelsea and the sides they were supposed to compete against were attracting - they've won the league and are in a FA Cup final. Their only failure imo is in Europe.