The supervisor was tough, but I learned so much. She will see your potential even if you cannot, and she will work you until your best comes through.
What I wish was different
I wish there would have been more people in the department, a lot of work fell on the intern just because it was a one person department plus the intern.
Advice
Big picture is important, but you can't get there without attention to detail. Work hard, and make sure everything you do is something you can be proud of.