What are the common challenges faced by interns?

Initially, everyone feels excited to work as an intern. They prepare themselves to work in the new atmosphere.
But just after a few weeks, they feel frustrated. This is most common among all the interns.
One such reason is demotivation. They are given with all grunt works which is new to them, but they are not appreciated with feedbacks.
what are the other challenges an intern faces?

Here are some of the challenges that intern face


Feeling hesitant to ask questions
Having competitive co-interns
Issues with time management and self-management
Work and efforts went unnoticed
Having uncooperative mentor