It is very difficult for Americans or Germans to learn Korean as there are many forms of respect in Korean.
For example, if you want to say "eat", depending on the interlocutor, there are many forms that cannot be expressed in German or English. In English one can only say, "Do you eat?"
So it's easy to think that learning Korean is very difficult.
However, when Koreans want to learn English, they face difficulties because the writing and pronunciation are often different, requiring you to pay attention to the phonetic symbols or correct pronunciation.
When learning German, every noun is masculine, neuter or feminine, so you have to pay attention to the change of case.
Mastering Koreans is not an easy task for Europeans.
For those who were born and raised in his country, it is not so difficult to master his home language.
But for forieners it is exhausting to master one foreign language.
Therefore, it is not right to say that one language is more difficult than another.
However, a person from Europe can learn German or English more easily than a person from Asia because German or English is a European language.
Conversely, Koreans can learn Japanese more easily than Westerners