Extremely Noisy, Loutish Behaviours

My wife and I (both in our 50s) used to go to this restaurant often when it was called "Cottage Inn", but it is now under new management and called "The Winning Post", and from our experience last night it is now attracting a much younger clientele from a younger generation who are incredibly loud and rude. We made a last minute booking for 9pm, and they seated us next to a group of six, who were literally shouting at each other across their table, and made so much noise that my wife and I were unable to converse and enjoy a relaxing evening. The food was excellent, but the serving staff could see our discomfort at the noise, but did nothing to assist, and nothing to ask the boisterous table of youths to be a little quieter. Eventually my wife, who was closest to them, asked them if they would mind being a little quieter, and she was then treated to a tirade of abuse and rudeness and vulgarity that I have never before heard in my life, whilst the restaurant staff stood in shock and were agog, but still did nothing. We finished our meal early, paid the bill, and left. Not a word of apology from the restaurant manager, no discount, no offer of "come back another time". Pity. This place used to be excellent, but not any more, which is extremely disappointing.