Maybe you had this feeling because you saw many superstars like Neymar and Messi in PSG during the last season but that's never enough to have many expensive and superstar players in your team to get good results especially when we are talking about a tournament like the Champions League and other teams got even better player but also a more balanced team.
A balanced team is very much needed and important than having a team filled with so called star players and there's no balance or even chemistry amongst the player such that on the field of play they have no good rhythm in their style of play because they are all stars and would want to shine in their various ways.
PSG would have been more focused on getting the team in a better shape than parking stars to the UCL, I know that will in a way frightened other teams but after they have seen how you performed even with the squad of good players, they are definitely going to understand that you do not have the strength to really cause the kind of damage they did think you were capable of so they will just end up challenging you because they are aware that the team has only got big names, a good build up will get PSG better prepared for subsequent season, they need a coach who has got the kind of Xabi Alonso's mindset