I would even say that all the top players who are at Chelsea this season are normal if they don't play to their fullest because the club's condition is not very promising overall. This has had an effect on other players who have received a lot of criticism because they are considered unable to help the club to slowly develop and improve their overall performance. Maybe our views will differ when we see the team playing well but the players don't show anything good, and that's normal when they get a lot of criticism because of their individual play.
No, even I don't blame the coach. I think it should be the management and the new owners that we should blame. They choose coaches who do not have the best experience and ability in managing star players. Potter was good at Brighton but bad at Chelsea. Lampard, he was at Chelsea but also has no improvement after handling the rest of the season. The new hope next season is Mauricio Pochettino. He doesn't have many trophies, but I think he's better than Potter and Lampard.
This is something to think about because some of the hasty decisions made by current owners and management regarding coaches or players have actually made them worse off.
Potter is indeed very good to train a club which in fact is an ordinary player without star players but indeed for a club like Chelsea, Potter's qualifications are clearly not capable and indeed this is also the case even though his decision is at Chelsea but of course there are those who play a more role and that is management there that made him at Chelsea and made Chelsea not play as well as before.
Now blaming each other is also useless for Chelsea because what they have to do now is improve their performance so that a dark season like this one doesn't happen again for them.