One of the breakthroughs I had in the treatment of my depression was realizing that we aren’t supposed to be happy and most of the things I thought I needed/desired (which in turn drove my feelings of failure/worthlessness that were central to my depression) were created by the external world, they didn’t originate as part of some actual need or desire, rather they were there because that’s what the world I grew up in and interacted with told me I need/desire. Seems silly/obvious in retrospect, but it was a big deal for me at the time.