No it doesn't depend on Luis Enrique only. There is a reason why teams from leagues like Portugal, Eredivisie, Ligue 1 and others almost have no chance to win the Champions League. The main reason is that these teams are not good enough and if they are in regards to the players they have and the quality they potentially can bring onto the pitch, then the teams don't get challenged enough throughout the year and are playing against far inferior teams all the time. But then out of a sudden the next opponent is called Real Madrid or Manchester City and that is when they haven't developed the tools during the season to deal with the problems that these world class teams can create for any opponent. PSG won't win the Champions League and I doubt that Enrique should be blamed for it. It's never the best idea to buy a club in a weak league, invest billions and then hope to win the Champions League.
The era of going a season without winning either the Ligue 1 or UCL leads to a coach getting sacked has to stop because most times, the coach isn’t always the problem here. Yes sometimes the teams in the league where the clubs participates is most times the problem.
Currently you can’t rate PSG as a club with any chance of winning the league. Yes they’re on a very low standard and can’t be compared to better clubs like the likes of City and Real Madrid talk more of the likes of Arsenal and yes Bayern Munich even though they’re not in the best of their form this season, yet PSG might not be able to stop them. Winning the UCL is quite different from winning your league.
In the Ligue 1, PSG have little or zero competitions and as such the league is more like their self titled especially as among all teams in that they seem to be the better amongst all. Winning the UCL doesn’t require you to have a billion squad and that will help you do it. No, it requires very extra work from the players and more especially from the league too as the clubs in the league need to also improve their way of play and as such it’ll automatically makes psg want to sit up and play in a better way as compared to how relaxed they’re now at least knowing they’re sure of winning the league and maybe the local cup.
Luis Enrique won’t be sacked because he’s improved this team and I’m sure he can even take them to the final but even on any note that he’s sacked and a coach like Zidane is brought, I think he might not immediately achieve much success because this kind of team needs to build over a period of one or two seasons then they’ll be able to get their feet. The owners of the club should be patient with Enrique and see what he can do with the team without Kylian next season then they can make a decision if to keep the coach or change him.