There is only one meaning to the word, the foul usage of the word is an abuse of one's humanity.
So you are bitching about some uses of the word bitch which the historical reference Webster's Dictonary defines as:
Main Entry: 1bitch
Pronunciation: 'bich
Function: noun
Etymology: Middle English bicche, from Old English bicce
1 : the female of the dog or some other carnivorous mammals
2 a : a lewd or immoral woman b : a malicious, spiteful, or overbearing woman -- sometimes used as a generalized term of abuse
3 : something that is extremely difficult, objectionable, or unpleasant
4 : COMPLAINT
Is that your bitch?
Aslan is not a
Tame Lion