I am not dismissing your concerns, but I've had the opposite issues going to the US where everyone is super chatty, seemingly needy, and slow.
You go into a store and they yell at you "DO YOU NEED SOMETHING" uhh, no, I'm sorry I came in to look around, is that a crime? The waiting staff return to your table every 30 seconds, and the cashiers are more interested in your life story than how you want your bags packed.
Aldi and Lidl are hyper-efficient. Sure, there's no bells and whistles, but all that stuff does is distract you from the goods on display that seem to rotate much more frequently than typical supermarkets (so you cannot just shop mindlessly).