Reactive depression can last for months. In severe cases it can last for years. This situation has to be removed before any improvement can be made. This is easier said than done. Bullies are not likely to admit to the fact they are bullies.
Exposure is what they hate.
As a spouse of bullying this is exactly what I did. So you could call me a whistle blower. If your partner is too ill to put any energy into making the bully accountable for their actions this is when the spouse becomes involved. There several steps a spouse can take. Firstly, inform the LEA's Personnel Department.