Lewis Hamilton did not clout anything. There was nothing dramatic about his arrival in the box. There is in car footage of his arrival, and there is no drama involved. The jack is in place, the car arrives. There is no need for adjusment of the jack, it just fails.
Beyond that, the jack should be designed to be "clouted". That is part of the deal if that is what you are trying to coerce your crew with beer with in order to get record pit-stops. Beyond even that there is always the possibility that the car will come in a little hot, or at the wrong angle and yes, the jack will get "clouted", but it should be able to withstand the clouting.
Indeed. Poor design if a car hitting the jack (which happens at least once every race weekend, and often many times) causes it to fail.
I don't know if it's the Sam Michael curse or their fabled management matrix system, but McLaren seem to lack the decisive leadership and direction visible elsewhere. Even Stefano Domenicali has managed to solidify his position and command respect of his troops and the paddock, despite the howlings of the Italian media whenever Ferrari slip up, whereas Whitmarsh, Michael et al don't seem to have the same respect of the paddock that Ron had in bucketloads. McLaren are no longer feared by their rivals the way they used to be.