^ Clara, Amy, and River were all great characters.
River was interesting before they Mary Sue'd her up and shoved her down our throats ever four or five episodes.
Clara was great in series 7 when we were all still wondering about the whole "Impossible Girl" stuff but since then, she's been a bore. (NOTE: Jenna Coleman is fantastic in the role either way, she just hasn't been given much to do this season in my opinion.)
Amy was probably the worst of them all.
Looking further back, Reinette and Sally Sparrow are great too. I don't understand your criticism.
Mr Awe
...characters who originated and were presented during the Davies run. As showrunner, its impossible for me to believe that though they may have been Moffat's creations, Davies wouldn't have had significant input in how they were presented on television.
Speaking of Davies, let's look at what he did with his companions:
Rose: Started out as a shop girl, ended up becoming a time warrior badass who ultimately crossed dimensions to save not only her new world but back again to save ours.
Martha: Started out as a medical student, ultimately married former companion Mickey after finishing her doctorate, basically running UNIT, joining Torchwood, and in her final appearance, still fighting the bad guys to save the day.
Donna: A temp from Chiswick and unlucky in love who literally saved the whole of creation and everything we know but had to give it all up so she could keep her measly life. And even then, she didn't want to. Certainly her fate is the most tragic of the modern Who Companions, but her story is immutably the best of the entire 8 series.
In each case, the companions were better off when the Doctor left them. Rose got her father (and ultimately her own "Doctor.") Martha achieved her goal of becoming a Doctor and saving the world. Donna actually realized she did matter and made a huge difference in the lives of innumerable people and will always be remembered for that, even if she doesn't remember it herself.
Then we come to Amy.
Amy, who married her childhood sweetheart, had a baby girl, lost her baby girl, got to know her baby girl, was left behind for 20 years on some planet and completely ignored that her husband waited for her for 2,000 years by her side and protected her because she was still angry about how she got stranded in "The Girl Who Waited," became a model, tried to leave her husband, then ultimately gave up her freedom and her own life, essentially, to be with her husband which, as I'm sure Moffat would like us all to believe, is what every loving wife should do. Though, I suppose we should be glad Amy ultimatley became a writer.
At least there's that.
And now, here we are with Clara, who apart from the Impossible Girl stuff, is likely about to have her own baby. Because clearly, that's Moffat's "get out of Companion jail free" card.
So, no, I don't believe Moffat is very good with writing female characters.