The aim of this article is very clear right from the start: to convince the readers not to use PGP. The first paragraph set the pace:
Cryptography engineers have been tearing their hair out over PGP's de ciencies for (literally) decades. When other kinds of engineers get wind of this, they're shocked. PGP is bad? Why do people keep telling me to use PGP? The answer is that they shouldn't be telling you that, because PGP is bad and needs to go away.