Instructions are not hard to follow, many a time they are just difficult to grasp. Following instructions discusses a list of tasks that should be done to ensure a successful outcome. Reading instructions step by step could be easy as long as there is no ambiguity in them.

Following instructions is hard as everybody has their own ideas on doing activities. People come from different backgrounds and languages which increases the chance of instructions not being understood. Instructions could be hard to follow especially if they are fast. People who are much slower, also not as focused as others could possibly get last in message. Instructions are misunderstood if they are not visible. They can be lost and difficult to find. Following instructions is an instruction and the rule is to follow each step, one by one.

I conclude that it is not hard instructions, it is following instructions that is almost impossible.
Intstructions are easy if they are clear and uncomplicated. Instructions need to be simple and to the point.