You guys talk too much about Pep's defenders as if that is the only thing which is not working currently.
His attack is quite meh this season.
Do you know why?
1. Teams are better and better when they play in person against Pep for 3-4 years.
Aka he is being neutralized slowly, AS ALWAYS.
2. His players are not as motivated as when he came, due to a success under Pep
3. He is burning out his teams. They can keep his level for 3-4 years max, after that you can throw his physically drained players into a garbage can.
Imagine if Pep stayed for 5th and 6th season.
His team would turn into a horror show, zombies walking around the field and internal fights between a manager and players.
He might be a master tactician, but he can't escape other physical, mental and other problems which follow any (formerly) successful team at the end of a cycle.