From the football365 piece:
https://www.football365.com/news/16...erpool-firmino-alexander-arnold-mane-hojbjerg
Mourinho blamed “individual mistakes” for the concession of “completely avoidable” goals recently, and indeed after this game. He technically wasn’t wrong to do so. But he must also see that his particular brand of cautious, rigid, low-risk and low-line football puts undue pressure on a defence ill-equipped to implement it, especially against such an energetic and effervescent team. It requires absolute unbroken concentration and perfect decision-making for 90 minutes against an elite, if out-of-form, attack. That really isn’t a realistic expectation, and certainly not of this defence.
To continue to watch individual mistakes and bemoan said individual mistakes as the sole reason for your undoing instead of devising a system and plan that reduces the likelihood of them being made is baffling. Don’t blame the trousers if you keep bricking yourself.
To be fair to him, all 3 goals came from bad individual mistakes. He might well then claim that we'd have won 1-0 aside from that
To your point though, the system simply wasnt working. We were being over-run in midfield and its amazing that they didnt rack up more