I'm a City fan who also follows Lyon (having lived there in the 80's). All those slagging OL off have short memories - they have done City over repeatedly in this competition - it was clear that they had a plan and they stuck to it. Tbh, they are a less talented squad than City's, but as we have seen on a dozen occasions over the '19-'20 season, you don't need to be a better team to beat City, you just need to get your tactics right - press hard and high, pack your defence, quickly close down City players in possession, force them wide when they get into the final third and use route 1 to bypass our midfield/back line and force errors in our 18 yard box.
Stones, Ottamendi, Walker and Garcia should not be playing for City. Same goes for Gundogan. Each of these defenders is either too slow, too clumsy, or too weak to do their jobs properly. Gundog showed early promise, but lacks creative vision and is more interested in passing backwards or laterally, rather than looking to feed those in front of him. He's now a dud. Jesus lacks confidence, and it showed tonight, but we need to keep him and work on cementing consistent performances from him. Sterling makes fewer mistakes than he did, but he too clearly has the odd shocker of a miss in him. KDB is true quality, but was starved of service in that game. Vital components of City's squad are now too old. Too stupid or too slow - not a winning combination.
I agree that Pep's tactics were poor (not for the first time) but for me team selection was just as damaging - the personnel he chose to execute his plan didn't do the job, and he failed to act to change things. Making only two (poor and tardy) substitutions, and leaving Foden and Bernardo on the bench places much of the blame at his feet. Pep has been a fabulous manager for City, but he has repeatedly got it more wrong than we have come to expect this season in the various competitions City didn't win. City are now firmly in a rebuilding phase, but someone needs to tell them, because they haven't made the acquisitions they have needed (e.g. Van Dyke) over the past five transfer windows to avoid the decline we have witnessed this season.