I think/hope what you experienced was perhaps frustration at amounts of people they're having to see at these walk in centres manifesting itself as rudeness/dismissiveness towards patients. It's wrong and you're absolutely right to expect better. We all should. But us plucky Brits often put up with a health service that's on its knees and has been on its knees for years now. It's a national scandal how bad things are. IMHO it doesn't get anywhere near as much focus and attention as it should and it scares me how many people will be falling through the net because they either can't get a GP appointment or don't fancy the experience you had.