Having travelled a lot as a passenger with various different airlines, this is a problem I have seen with nearly all of them.
Cabin Crew have sales goals, bonus etc. , and keep pumping passengers with alcohol as much as they can. I have NEVER seen any CC say no to sales.
Observing the condition of the passengers, I am fairly confident in case of an emergency there would be complete mayhem and chaos because of the condition of these passengers that CC have been plying with alcohol during the flight.
It will as always in aviation take one major disaster and major loss of lives before aviation will learn, as always lessons are only learned when written in blood and loss of lives.
The tragedy will be that the ones who are not drinking will be the innocent victims of this.
An airport is a port of travel, not an alcohol SUPERMARKET or a NIGHTCLUB.