I think maybe 5% of the time it isn't about love but the other 95% it is. A lot of people really are missing love.

The Netflix Series 13 Reasons Why seems pretty unrealistic except maybe it represents some unusual cases. In that series there are clearly people who cared about her but she was missing the caring of certain people (and I don't fault people for feeling bad because one particular person or a few doesn't like them). A lot of people don't have much loving attention at all though.

There is literally nothing aggressive about depression.

Then why are people suffering depression packed full of stress response hormones?

https://www.youtube.com/watch?v=NOAgplgTxfc

Are you familiar with the expression "fight or flight"? They feel a need to flee, but there is nowhere to go.