Any Japanese teacher here? I want to quit.

I can't keep up with my sensei. I can't remember so many new words. There is no trick to memorise them. It is dry memorisation.

I keep saying みます to most conjugations when I am nervous and I don't know why.

I was listening to the audio file
六時ごろ家(いえ)に帰(かえ)ります

I couldn't even hear (いえ), (かえ) and り because it was so fast. 家(いえ)に sounded like いに, 帰(かえ) sounded like (か) cand り sounded like is missing in the sound file.

I hate to disappoint my sensei. I feel like quitting the lessons and study on my own at snail pace.

I don't know anymore.