It's been a thing I heard multiple times throughout my teen to adult years and I was furious and confused whenever I heard it.
From my perspective my generation was more informed and mentally more matured (in some cases way more than required ie sexual in pre adult age) but I never thought as a whole they were stupid.
I also heard my gen is ungrateful and easily manipulated and made to work for someone's agenda while thinking of it as some noble cause or social services or even for sake of their(our) own betterment.
But after looking at a certain situation folding out here and the opinions on it by people who I think are almost close to my generation, I am starting to feel there were some merit in the words I heard before and we certainly are more easily manipulated due to early exposure to all sorts of shenanigans because of digital advancements.
I am from gen z btw.