Section Bank Q's are so hard?

I have about 6 weeks out until my MCAT, and I'm doing section banks now, and they are soo difficult. I know they are supposed to be hard, but what "percentage" is considered good for a 128? I got 68% in P/S despite going over and doing Anki for the 300 pg KA doc. Bio is worse. I got a 52%. I started off really well, getting the first 10 questions right, but then there are some passages where I get every single question wrong (0/6), and many more sections where I get below random guessing... Section Bank Q's are so hard?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: MCAT: Medical College Admissions Test Source Type: forums