If you remember what a linked list is, how pointers (or references) work, and have written more than 10k real world lines of code in your favorite programming language, I would fully expect you to be able to write, not memorize, any of the linked list functions that you mention.

I certainly understand your frustration, but I really don't think either the tone or the content of this blog post is going to help land a job in this era where hiring managers ask Google what it knows about a candidate.