Meds and/or not good enough care when it comes to people suffering from mental illnesses. There's not enough focus on how to help people that suffer from illnesses and there's lack of awareness on how a lot of these meds work. Dealing with bad responses and dangerous withdrawl symptoms. Most people have no idea.
But leave it to the media to make everything about the guns. It's a cheap way to get everyone riled up, and be lazy to not have to think any harder about any other issue. Blaming guns makes it more political and partisan which means very little gets solved.