While Kōga sitting alone in a cave, Muramasa appeared and asked him why he would kill innocent bystanders, which prompted Kōga to claim he was teaching Soul Society a lesson for exiling him from their world. Soon, Kōga was even abusing Muramasa when he was anything less than absolutely obedient. This disharmony between them gradually caused Kōga to lose his ability to communicate with Muramasa, or even access his power.
Bleach anime; Episode 251
If killing innocent bystanders can make a Zanpakuto feel bad and revolt to its master, why wouldn't Kyoka Suigetsu revolt against Aizen?