Learning a language to a high level is genuinely difficult and requires time, effort and pain. Some people gloss over the struggle but I think we should be honest, because everyone goes though difficult periods and it's important to know you’re not alone!
I once took a graduate linguistics class that was conducted in Arabic despite having never studied linguistics, and everyone else in the class was essentially fluent whereas I definitely wasn't! I would regularly do transcriptions into the international phonetic alphabet (which I didn't know) of an audio I couldn't understand--nightmare! Despite the difficulities it was a great class and exactly what I needed. The pictures on this page are little notes of my feelings after class!