(For context, this is an infamous pro-suicide website, so these are likely its beliefs)

Philosophical ideologies that can be percieved as suicide-adjacent (placing less importance on the value of life, and questioning whether some lives are worth living; or being created in the first place):

Antinatalism: A philosophy that assigns negative value to existence; suggesting it contains more suffering than pleasure, and is imposed upon the individual without their consent.

Nihilism: A philosophy that views all life as meaningless.

Promortalism: A philosophy that assigns a positive value to death, by suggesting that the lack of desires that comes with it is a viable solution to our earthly problems.

Libertarianism: The belief that the individual is the owner of their body and has the right to dispose of it however they see fit.