The team know exactly what Lando was doing and I'm sure understood plenty of how the car fed back to Lando, I also expect that the Team coached Dan based on what they know from Landos feedback and from the telemetry of both drivers. Armed with all of this and plenty of time to go with it, Daniel was not able to master the car.
I think Lando is a bit blunt with his words and could learn how to be a bit more diplomatic but that isn't to say that he is wrong. There's one guy he absolutely has to beat and his form and ability is judged in a sizeable part based on his performance against his teammates, so he's not going to go over to his side of the garage and tune Dans car for him. Would Usyk stroll mid fight up to Anthony Joshua and just point to where his chin is because he feels sorry for him?
They may be on the same team but the reality is that they fight each other for top dog unless the team pulls hard on the leash.
Sadly with these two that was rarely required.