It seems extremely difficult to come to any more favourable conclusion.

I’m often bemused to see talk of “young, experienced crew” on threads describing major service failures, and put forward as though it could potentially be a valid explanation.

Had I received the exact standard of service related by the OP (in either a business or first class cabin), my own first thoughts would not be that the crew were young and experienced, but that they were incompetent, discourteous - and should be in a totally different job ; preferably, nothing to do with the hospitality sector.