I remember taking that one. It was the hardest one I've taken TBH.
The Ap Gov exam was easy for me this year though. Which is weird because it' supposed to be the hardest test for Social Studies.
That's probably it then. I remember the AP Euro exam being really stressful for me, as well as APUSH, but I've gotten used to the enviroment of AP tests and was pretty comfortable when I took AP Gov this year. I was even nearly late to the exam and I felt relaxed and ready to take the test.
I think what really gets to you is the essay portion, which thankfully the AP Gov exam didn't have. The writing section is definitely the most difficult out of all the tests.