We all know how hard it is to keep validating our WAS's feelings when they are in full "fog" mode and blaming us for their unhappiness. Yet, it is so important if there is hope of helping the fog to lift.
So, you validated, BUT you also put the ball back into his court, asking him to let you know what he needs from you. If he is going to complain then he needs to help with the solution. Good job on that.
You are validating, but not taking on the blame. Good balance from my POV.
