This does not appear to be an April Fool's Day joke or otherwise satirical. It is, however, hard to make seriously. If I'm understanding him right, the claim is that it is a moral wrong to being someone new into the universe and the supporting evidence for this is:

  - The worst pain is more bad than the greatest pleasure is good
  - Satisfaction is fleeting
  - Lifespan is limited and bad things happen more than they ideally ought to
  - Humans cause ecological and social damage.

What astounds me is that nowhere in this 3400 word piece does the author consider (a) the frequencies of pain vs pleasure, or (b) the good done by humans in the world. He notes that "daily life is filled with dishonesty, betrayal, negligence,... Of such harms, everybody is, to varying degrees, a perpetrator," but misses the obvious corollary: life can also be full of honesty, loyalty, love, etc. These too would not exist without people. This focus only on the debit side of the moral ledger of humanity is an oversight bordering on intellectual dishonesty.

The point about ecological damage, and the existence of adoptable children, are both more reasonable critiques of "natalism". That is a nuanced topic worthy of discussion, but this article doesnt add much to the discourse there, more adding them as an afterthought to the overwrought "existence is pain" thesis.

Edit: formatting and clarity