Paradise Lost question

I feel like I can't fix my thoughts on this book. Sometimes the Satan seems to be the protagonist, sometimes the God, but most often Adam and Eve.
In book-9, after the fall, when Adam and Eve were accusing each other, Eve told that if Adam was to be in her place, then he would have done the same mistake,—"thou couldst not have discernd
Fraud in the Serpe" — I feel she's right. Again, sometimes I feel she's just quarelling, since Adam is more capable and holds more reason, he wouldn't have, and that's why Satan had to use Eve.
I can't accept Eve's inferior to Adam.