Ansan City Jeonghwan Dermatology Clinic, tired of long waits and unfriendly service

Wart cryotherapy and laser treatment. Acne extraction.
The procedure itself is over very quickly, but there is a lot of waiting.
Even though I went there at 6 o'clock before opening, I was 13th in line.
After I finished paying and came out, it was 10 o'clock...^^....
I don't know yet if it's a famous doctor since I had the procedure today.
First of all, the desk nurse is really unfriendly.
Of course, it can be tough with so many patients, but it feels like he's letting all that hardship out and taking it out on his customers. He never makes eye contact when I ask him questions, and he responds with annoyance and sighs to everything I say, so I have to be careful about what he says.
It was hard because I had to please him.
The elderly people were flustered because they didn't know how to use the app, so they didn't help them at all. They just sighed and repeated the same thing until they saw that they had to go into the Play Store, so another patient who was sitting next to them offered to help them.
I'm not sure if I really need to go since I'm feeling uncomfortable from the morning after wasting half a day ㅠㅠ