One of my best friends is a LISP expert; though he and I disagree violently on the value of functional programming, he agreed in every single case when I asked him (and I asked often) that the functional code I was seeing was just plain bad, wrong, or occasionally, even "insane". Believe what you will of me or my abilities, but it's not just me. The FP devotees claim it's possible to write good FP code, but it's not what happens in the field, in my experience.

About 90% of the Perl code I've ever seen makes me want to vomit. The fact Perl is relatively easy to learn might be one of Perl's biggest weaknesses, since it results in heaping piles stinking code written by people who can barely type, let alone know the first thing about programming. But that doesn't mean that Perl is worthless, does it?