When Gwyn was violated, she was taken to the safety of the library, surrounded by women, and offered therapy. No one - especially men - could enter the library without her permission.
When Elain was violated, she was taken to the HoW, guarded by Nesta, while Feyre and the entire IC made sure that Lucien kept his distance and gave her time to grieve and deal with her trauma.
When Nesta was violated, she was taken to the HoW, where her boundaries were repeatedly violated by Cassian, who came to visit every other day without her permission or consent. Her personal space was violated by Mor, who decided to get all handsy without Nesta's consent, even though she knew Nesta had just been abducted, tortured, and violated. Cassian joked about Mor ripping off Nesta's dress when Cassian knew Nesta had just been sexually assaulted mere months before being violated in the Cauldron.
First of all, why weren't Elain and Nesta taken to the refuge of the library or at least offered therapy? Secondly, why was Cassian allowed to violate Nesta's boundaries without her consent or permission, but Lucien had to respect Elain's? Why weren't both males held to the same standard? Why did Cassian respect the consent of the priestesses by not entering the library without their permission, but he repeatedly disrespected Nesta's boundaries? Could you imagine if Az had gone down to the library every other day to check on Gwyn or Lucien checked in with Elain every other day without their permission? The IC would have had a thing or two to say to them... but not Cassian. He could do whatever he wanted, with or without Nesta's consent.
Then there's Feyre's, "Why do you even bother, Cassian?" I'm sorry, but what? Who the hell is ready for a relationship right after being violated? He shouldn't be bothering. Feyre should have been telling Cassian to leave Nesta alone.
The IC taught Gwyn and Elain that their consent mattered, that their "No" meant "No" and that their boundaries would be respected. Simultaneously, the IC taught Nesta that her consent was the last thing they cared about. Her "No" really meant "Yes" if they asked her enough times and bullied her around to it, and her boundaries and autonomy would most certainly never be respected.
The IC have always been so incredibly toxic and cruel to Nesta, while demanding that she treat them with kindness and respect. Cassian and Mor have the audacity to say that Nesta would thrive in the CoN? Someone needs to hand them a mirror.