AIP-Agency was a disappointment, internship company was great

I have to say that overall I was very disappointed with AIP.
In the beginning, the agency seemed very competent, the registration worked perfectly and my supervisor took a lot of time for me during the consultation and answered all my questions. After I decided to find an internship in Korea through AIP, I transferred the deposit and immediately received notification that they were looking for suitable positions now.
I waited and waited.... and nothing. After asking several times whether there is a problem with my CV I finally got an appointment to talk to a potential company - but this appointment was never confirmed to me and on the day itself I didn't get any notification. The notification came one day later with the message that the interview could not be perceived by the company. I wanted to fly in April and it was the end of February now (I had registered at the end of December) and I still had not had a single interview.
After putting more pressure on my supervisor, I finally had an interview - and this company was great!
After the interview, it was clear to me that I wanted to go there, and luckily the company wanted me as well. So my supervisor and I discussed the process and when I could fly.
But for my documents, which I needed for the visa, I had to write several emails and I wrote directly to my future boss in between because I didn't get any news from AIP.
AIP already seemed very disorganized at this point, which was confirmed during my stay in Korea. When I arrived there, I let them know that I had arrived and was now sitting in my quarantine hotel for the next two weeks... I hoped that I would get some introduction to the Korean work-life or something... but again nothing. I got a reply to my email saying that I shall get back to them if I had any questions. That was the last time I heard anything from AIP while I was in Korea for those three months...
Finally, after my return to Germany, I got a mail asking me to rate them. That is what I am doing now.
In my opinion, AIP makes a thoroughly competent impression with their website and their possibilities throughout Asia. Unfortunately, this has not been confirmed. I perceived the company as very disorganized. You pay a lot of money, so I think more help should be definitely included and expected.
Especially in comparison to other companies, I think AIP performs poorly. A friend of mine came to Korea with Korea GapYear and was supported by them at all times and was even asked several times how she liked the internship and if there were any problems. (so a clear recommendation to Korea GapYear at this point).

I was lucky that my internship place was great and I got along very well with my boss. Therefore, despite the chaos in advance, my time in Korea was a success personally as well as professionally. Unfortunately, AIP had nothing to do with the success except for establishing contact with my internship company.