Is CompTIA Sec+ really that hard?

I have been studying for a while from Prof Messer's videos online. I did a mock test from Gibson's Get Certified Ahead book, i did 20 out of 50 questions, I answered 12 correctly. However, the 10 questions on the CompTIA website, i answered all of them correctly, and they seem much easier.

Obviously, I want to pass. But now I am a little bit scared. On reddit (ew) discussions are always making it like some terrifying thing. While I was very confident, after trying Gibson im now a bit scared and will be studying form Gibson's book as well while maintaining my notes from Messer.