An argument could be made that there are 2 groups in the organization. The abusers and the abused. When an elder steps down he is essentially changing groups. He is switching from the abuser to the abused. That explains the treatment he receives.
The only caveat to that is like punk of nice said, if the former elder is well connected especially in a ruling family or social circle, then he can still be treated ok. This could be explained by the fact that he remains well connected to the abuser class and thus remains feared.