My postman is lovely. He hides my parcels and always gives me a thumbs up when he drives past.
My mums postman is shite. He leaves parcels in a communal bin area, doesn't put a card through the letter box to tell her a parcel is on the bins, he doesn't knock either, so my mother has to pop her head out of the door every half hour to check if he has been.
Just to add, hermes don't knock or leave a card either, they also leave parcels in the bin area.
Yodel OTOH knock on the door, and when my mother hasn't been in, they leave a card.
YANBU. It all depends on the individual postman imo.
FWIW, I have also had post stolen, post ripped open, and my sister has been receiving post from 6 years ago in the last week, due to a postman having been found hoarding post rather than delivering it from 6 years ago. Apparently lots of people in the same area are affected.
Posties are human and as such, there are good and bad.