Originally Posted by MSPeconomist

NO, telling the other FA that you want to make a complaint is likely to get you thrown off the flight. In fact, you can be kicked off by crew even if they think/believe/fear that you might file a complaint or if they remember you from some earlier flight where a complaint was made.

FAs tend to protect their own. They will not tell you their colleagues' (first) names when you ask, no matter how justified. GAs behave the same way even when they obviously think that their colleague is seriously wrong.