Brand new car with only 1000 kilometers

Belgrade Airport branch. Arrived an hour late for an 8 AM pickup, but it wasn't an issue. The overall process was smooth. They offered me an upgrade from Polo to Golf twice for an additional fee. I politely declined, and they ended up offering a free upgrade, which I gladly accepted. When returning the car at 9 PM, the return window was closed, but there were staff available in the Europcar area of the parking lot to assist.

Picked up the car at 22:50, which was after working hours (they close at 22:00). The staff seemed a bit indifferent as they were thinking about leaving, and there were some language barriers, but it didn't delay the car pickup.

The weather was cold and rainy. We were asked to drag our luggage to the parking lot, but there was no car available there. We were told to wait for five minutes, but it took about twenty minutes. It was 0 degrees and raining, and after such a long wait, a car with a flat rear tire arrived. We found out and were told we had to wait another hour to change cars. It was too cold, so we dragged our luggage back to the airport to wait. The process was inefficient, and the pick-up staff were very rude with a heavy accent in English, and got impatient when asked to speak slower. We were the only ones renting a car that day, but it took a total of three hours to finally depart.

The car was not thoroughly inspected during pick-up, just a brief introduction. However, during drop-off, the inspection took nearly an hour with every inch of the car being checked meticulously. Shouldn't the inspection process be consistent for both pick-up and drop-off to be fair?