Yeah, I wouldn't blame the Justice League for how Wonder Woman seems to get shafted constantly. That's really the fault of the people in control of her own book, who are always taking her out of any teams.
Surprisingly, when Denny O'Neil was the writer of the Justice League and the co-writer of Wonder Woman, he had her leave his Justice League (replacing her with Black Canary), after Diana gave up her powers (but was still just as good at martial arts as B.C.).
When Diana got back her powers, it took forever for her to return as a member. And Julius Schwartz was editing both books. She had to go through twelve trials--which took two years, given the frequency of her own title.
No sooner did she join Justice League International than she was out again.
This bad luck transferred to Queen Hippolyta, when she was retconned as the Wonder Woman of the Justice Society. After being featured as a regular member in their book, the people on the W.W. book had her iced.
The junior Wonder Women have maybe had a bit better luck. But given Donna Troy's identity issues, I'm not so sure.