According to the interpersonal theory of suicide (ITS), there are three self-perceptions that explain a high percentage of suicides. They are:

  1. Thwarted Belongingness ("I am alone")
  2. Perceived Burdensomeness ("I am a burden")
  3. Capability for Suicide ("I am not afraid to die")

The creator of ITS defined thwarted belongingness as "loneliness and a lack of reciprocally positive relationships". It has been similarly defined elsewhere as "a sense of loneliness and an absence of reciprocal care". Almost 1 in 3 people who kill themselves experience thwarted belongingness, and so do most or all involuntary celibates.

There is no reason to assume that the blackpill rather than inceldom itself is what causes incels to be miserable. The mere sense of loneliness, even if it's not an objective reality, has been causally linked to a whole range of bad life outcomes, including mortality. It is one of the strongest predictors of suicidal behavior.

Bluepilled incels blame their own actions, and not their genetics and female nature, for their lack of success with women, and they seem to be at least as miserable as blackpillers are. Subreddits where they congregate, such as r/Foreveralone, r/FA30plus, and r/Lonely, are full of misery, self-loathing and depression, and are much less humorous than blackpill forums.

Are "bluepilled" cancer patients who blame their own lifestyle choices and actions for their disease less miserable than "blackpilled" cancer patients who blame their genetics and other factors outside of their control? I doubt it. And at the end of the day, whether or not the opposite sex is attracted to you can be just as much outside of your control as a disease like cancer can be.