Bro what you never followed the show? How have you never watched it? Its one of the best shows that western animation ever produced. You really should watch it at least once, the original series if not Korra.
To answer your question though I have little sympathy for characters who kinda deserve to be treated like shit, or who I feel are annoying. Korra, Azula, and Kuvira come to mind in particular.
For characters like Toph, Katara, Ty Lee, Mai, taking advantage of them and bullying them just makes me feel icky and gross in the pit of my stomach, like I'm doing something morally wrong and I should stop.