Math 2 Barron's Prep

I’ve been prepping for the SAT Math 2 subject test for the past couple months and I finished going through and completed the Barron’s book. I sat down to take a practice test and it was so hard… I don’t understand why it’s so hard considering I did the whole book and all the practice problems, I thought that would be sufficient preparation. I’ve heard a few people say that the Barron’s tests are overprep and are much harder than the actual test, is that true? Because if this is what the actual test is like, I’m screwed…

Any answers/advice would be much appreciated. Thanks

FEEELLLLLLL