I find instructions overwhelming. I know as a child, my father would always give me a series of instructions all at once, and it felt like aggressive bullying, and I couldn't remember the list at all. Often, when someone gives me instructions, I don't even hear words, it just becomes garbled noise.
I once lost a job because I was verbally trained to close the store, and while I could close with someone to supervise and give me step by step directions, the next night I was completely unable to close at all. I didn't know what I was supposed to do in which order, and was basically told to figure it out for myself. I got fired the next day, because the store was simply not ready.
I was given instructions on how to close a different store I worked at in writing, and I had very little trouble.
I think there are two or three things going on that make verbal instructions difficult to impossible for me.