On the one hand, this rant is 14 years old now, and discusses a version of Perl that is vastly different from what exists today. On the other hand, Perl 14 years ago did have serious problems, as did its competition, and the rant makes some decent points.
For what it's worth, I can do the exercises from SICP ( https://mitpress.mit.edu/sicp/ ) without much difficulty in modern Perl.