We're not depressed, the rest of the world is just stupidly optimistic.

Only partial agree!

I think there is a group that is nihilistic and follows that with a defeatist view

There is also a group that is nihilistic and extremely content with the state of the world and molding it to their liking. Which is very useful

and then there is everyone else with the optimism

also this is not depression

Sounds like you have succumbed to the engagement algorithms