Female characters just aren't written as diversely as their male counterparts for the most part. They are either the all-perfect heroes, the sexy love interests, or the mother hen of the group. Those are ok, but they just don't have the same depth as the men. Now, there are a lot of female characters that do break out of the cycle, but the rest are still limited by the boundaries that are put on them. In some cases, they are not allowed to screw up as badly as the male characters do. And if they do, there is always some explanation for their actions that absolves them.

For example, Hank Pym still has to live with hitting Jan. Meanwhile, writers spent YEARS bending over backwards trying to absolve Wanda's actions in Avengers: Disassembled and House of M by blaming everything on Doom.