The passage from the article that best supports the idea that the popular game of Monopoly did not turn out the way Magie intended is:
"Instead of teaching players about the pitfalls of greed as Magie had hoped, the game she invented was taken for a spin, becoming a race to get filthy rich while driving everyone else around the table into poverty."
This sentence clearly captures the contrast between Magie's original intention for the game and its subsequent evolution into a game focused on wealth accumulation and competition.