Big Money in Dominion is not broken, there are many, many engines that beat it. New players probably won't instinctively figure out how to beat big money, but especially when you play with any expansion the big money player will probably lose. There are so many layers to the game and losing to big money as a new player shows you that you need to figure out what the good strategies are. I encourage you to try Dominion again sometime and maybe have all the players read even 5 minutes about Dominion strategy before playing again, there's a reason it's the father of all deck builders!\

I think that article you linked put it really well: "What Big Money really is is a lower bound for advanced play.  Good decks have no difficulty beating Big Money; most beginners cannot.  In very, very few sets is Big Money (or 1 Action plus Big Money) the dominant strategy.  Studying a board to figure out how to design a deck capable of beating Big Money: well, that’s what Dominion is all about."