I often use the Executive Lounge at Liverpool Airport and, whilst it is not the best I have been in, I have found the food and drink on offer to be fine. They have Kenco Coffee, Tetley's Tea, Jacobs biscuits/crackers, various cakes/pastries, cheeses and various drinks including Fosters and Heineken. I think you will agree these are known brands.
The staff have always been helpful and courteous, if something is not available such as milk, which happens sometime, then just ask. It is not too hard.
The lounge is not operated by Liverpool Airport but by a company called
Halewood International.
I think the person involved is coming across as being a little snobbish. Everybody has a right to go into the lounge if they pay their money or invited to do so at someone else's expense. The lounge is not free to anyone. Perhaps your friend wants to vet all entrants into the Executive lounge first!