Warhol was mostly marketing, like Kim Kardashian with a paint brush.
But you challenged us to read, so from Wikipedia:
"New York's Museum of Modern Art hosted a Symposium on pop art in December 1962 during which artists like Warhol were attacked for "capitulating" to consumerism. Critics were scandalized by Warhol's open embrace of market culture."
"In 1979, reviewers disliked his exhibits of portraits of 1970s personalities and celebrities, calling them superficial, facile and commercial, with no depth or indication of the significance of the subjects. They also criticized his 1980 exhibit of 10 portraits at the Jewish Museum in New York, entitled Jewish Geniuses, which Warhol-who was uninterested in Judaism and Jews-had described in his diary as "They're going to sell."
"The Philosophy of Andy Warhol (1975), 'Making money is art, and working is art and good business is the best art.' "
I believer it is the opinions of those critics and reviewers which have stood the test of time, not Warhol's artistic works.