An ordinary post office in the city center, works normally, you can make a photocopy, pay for community services (though queues), buy a postcard or envelope, I rarely visit.
The most terrible cashiers or whatever they don't want to work are always busy with something, collecting queues, everyone has some kind of overtime breaks, etc. plus they put an electronic queue and it got even worse
it got better after the introduction of the electronic queue. but the disadvantage is that there are several windows for maintenance, but not all of them work