BSL is a small airport and hasn't got many facilities, as I pass through it about every 3 month, I'm glad the lounge is there. Yes, the food can be terrible at times, I always hope for the pizza slices or filled hash browns to be on offer, not the weird Thai noodles or obscure tagnine slob they sometimes have. I absolutely love the Cremant and always help myself to several glasses. As others said, if it's flat, just open a new bottle.
Overall, I quite like this lounge and IMO there're worse ones on the network, such as Stuttgart (beyond dire) or Luxembourg (late flight and no food being refilled).