Another explanation [of why Isaac is mentioned first]: because [Esau's wives] caused the holy spirit [the divine inspiration of prophecy] to depart from him [Isaac].
Esau's Wives Drove the Holy Spirit Away From Isaac
Yalkut Shimoni on Torah 113:4
דָּבָר אַחֵר לְפִי שֶׁגָּרַם לוֹ לְסַלֵּק רוּחַ הַקּוֹדֶשׁ מִמֶּנּוּ.