Why should he be pissed off at the club? He's the one that chose to stay.. Lucho counted on him. Pretty dick move to announce your leaving though at this stage of season. Right after a loss.
But this was a weakened PSG team, missing key players, who also had a shitty start to their league and Cl. Barca/Lucho needed to make a statement and failed
Barca needs a WC manager. Instead of trying to recreate Pep 2.0. All the top teams have better mangers than Barca. Bayern, Madrid, Atleti, Chelsea, Borussia, Manu, etc..