I do think it is more about wide feedback than 'men can't portray women well'. It's easy to overcorrect or make weak characters (not only women) when you're in a monoculture and your feedback come from the same kind of people. My example is Raymond E. Feist. His characters (especially female, but not only) were really weak before he partnered with Wurts (which, in my opinion, gave birth to their best work), and in all his following books all his characters were way better than in his first works.