I agree, that these issues are not acceptable.
The biggest problem about LH is still the inconsistency. My best flight in F were with LH, some of my less good flights in F as well.
I don’t understand, why LH has a problem with standard procedures. It seems like it’s up to the crew, how to provide service. It looks like they often improvise instead of just following the book (I hope there is a book). There should be a definition of a maximum time a passenger has to wait for meal, beverages or bed. It’s ok to wait two minutes, but even five minutes are not acceptable with two FA for eight passengers. Not to speak about 30 minutes or more.
They even have different ways to split work. Sometimes one FA is focusing on meals and beverages and the other is focusing on the communication with the passenger (btw: that works fine often). Sometimes one FA is serving one half of the passengers and the other os serving the other half.
LX is more consistent, but most consistent is OS, but they don’t have a F.