You aren’t bad Dominant if you chose not to engage with a sub who has a mental illness. It’s probably safer to chose to do so if you know you can’t handle it. It sounds romantic to push through, but sometimes you need to be logical about what you can handle and the support you can give.
If you don’t have the patience, time, knowledge or willingness to learn, and understanding, you may do more harm depending on the illness involved.
Mental illnesses are real things. For those of use who struggle with it is a tangible thing.
You have to be willing to listen and compromise on bad days and ready to switch back to y’alls version of normal on good days.
You also have to understand those bad days doesn’t mean go vanilla. Pay attention to your negotiations and make sure that you are reinforcing a safe space environment for your person to continuously be clear about their mental health.