The only scandals I can think of are... Sicagate and I don't think that any of the scandals here can be compared to one another because each person was personally impacted in ways that we'll never fully understand, beyond what we have seen and speculated.
As for Sicagate, I will never forget how in one of Jessica's interviews she said she became depressed and wasn't in any condition to accept jobs for a while, as well as that other interview where she said she felt like the most hated person in the world, and last but not least, Krystal's letter about how it hurt her to see Jessica crying often and being in a state of despair. It also doesn't help that whenever there are articles about Jessica, people make comments saying "Wasn't she going to give up singing to be a designer?" "Didn't she leave to get married?" when Jessica never said anything about giving up being a singer or giving up being involved in the entertainment field and she still has yet to get married.