Ayn Rand does that to people.
One becomes "objectively miserable".
Not all people. Her writing is very intense and passionate, and her principles extreme and absolute, so you either hate it or love it - there's seldom any middle ground. But a lot of people who read her works and get inspired think that they have to behave in the uncompromising, puritan way the main characters in her novels do, which is, of course, not right.
I know people who've taken up smoking after reading Atlas Shrugged or The Fountainhead, just to convince themselves that they're more objective because of it. These are the same people who just parrot her writings like some of the meatheads here do with gh15's way of "speaking". They'll despise Kant or adore Rachmaninoff simply because she did the same, which is nothing short of pathetic if you ask me.
I've read all of Rand's writings multiple times and consider myself one of her biggest fans, but I could never do the stuff that her misguided fanboys do. Her philosophy is great (or full of shit, depending on who you ask), but what she presented in her novels were idealistic, extremely "pure" characterizations to drive home her POV. You can't be Howard Roark IRL - you should just get inspired by the character and maybe improve your life in some way by incorporating the principles that make/drive him. Like Batman, he's just a symbol you can draw courage from and stand up to bullies, to give an example, not put on a mask and start fighting crime in the streets with home made gadgets