It's exceptionally bad if they're not giving out glasses of water. easyJet do.
There's no excuse for running out of products. They have a full rear galley and additional galley stowage at the front where they can carry ambient products. I can forgive them for running out of fresh options but not ambient given the vast amounts of storage space they have in comparison to easyJet.
It's also strange how they complain about the sales system and how it's so slow. If it's so slow then how do they manage to run out of food so quickly? easyJet have half the storage space, more passengers, short turns and often very short flights on four sector days. They don't even have a full size oven yet easyJet crews manage it somehow. Why can't BA?
It sounds like militant crew who think BoB is below them who are doing everything they can to ensure that it doesn't work.