The details here are multitudinous but I believe it is common historical insight that the "dark ages" came to an end through the Renaissance and the primary mover of this Renaissance was a return to the Grecian ideals , specifically the works of Aristotle.
Now, I personally do not consider the "dark ages" as dark but glaringly bright but given the nature of the progressing man we have those who cannot live with their present unless they denigrate all that came from the past.
Naming it the "dark ages" is no different and is poor history. In any case the return to Aristotle brought reason (age of reason) and brightness to the fore as per historical understanding.
First paragraph of Stanford reference:
https://plato.stanford.edu/entries/a...m-renaissance/
" Aristotelianism in the Renaissance
First published Wed Nov 16, 2005; substantive revision Wed Feb 28, 2018
“Renaissance” is used as a useful short label for the period ca. 1348 to ca. 1648. But the use of the term “Aristotelianism” as applied to texts, contents and contexts of that period is problematic.[1] Some authors did indeed consider themselves as part of a “peripatetic” (i.e., Aristotelian) current or school,[2] but it would be counterintuitive to limit the application of the term “Aristotelianism” only to those authors of whom such statements are known (since it probably would exclude most Renaissance commentators on Aristotle). [3] On the other hand, if we use the term “Aristotelianism” to denote everything in Renaissance philosophy that with some high degree of probability makes direct or indirect use of Aristotle’s texts: this would mean that “Aristotelianism in the Renaissance” and “Philosophy in the Renaissance” are equivalent terms (cf. Keßler 1990).
However, there are texts in Renaissance philosophy that are obviously more “Aristotelian” than others, namely, the commentaries on texts by Aristotle. There are more of them than we have from any other period of the history of philosophy. And in many of the Renaissance universities philosophy training was keyed to the interpretation of texts by Aristotle and often involved the use of textbooks derived from works by Aristotle and his commentators. In addition to this, the corpus Aristotelicum was used as a matrix for textbooks and encyclopedias and as a starting point for treatises on more or less special philosophical questions."[4]