I think his complaint is that a lot of the Symfony docs don't simply say what things are/do, they instead inform via examples. Which means you have to parse the examples first to understand what's going on.
Yes, "documentation" implies a curated and complete reference, not a collection of code snippets that may or may not apply to your current problem and version of Symfony.
(No, random posts oт Stackoverflow and generative AI responses aren't a replacement for documentation either.)
Also, random code snippets that may or may not work is not documentation, much less is it a reference.