Hankster, it's great that you enjoy Bakery 88. However your experience doesn't speak for everyone, and in fact I'm sure Karine actually appreciates the feedback, both positive and negative. You can consider poor service "nit-picky", but ask Karine what she thinks and I'll take a guess that she disagrees with you.
As for a business needing "thanks", it's hard to know why you think this is so, but feel free to praise it all you want.

I just suggest that in future you respect other peoples point of view, which is after all based on their own experience, and is equally as valid as yours.