Disappointment With Today’s Test

I have been consistently scoring around the mid to low 170s with 168 being the floor for my practice tests. Todays test had what I consider to be one of the most difficult sections I’ve encountered and I had to guess on a substantial amount of questions.

I have been studying for many months and this is my fourth time taking the test. It seems ridiculous to say that it’s unfair, but I can’t help but feel like I’ve somehow been cheated. Has anyone had experience with this/feel like they’re in the same boat? What would you do?