If you heard this then you have heard it wrong.
Few years back a person has bought one pizza buy paying a couple of Bitcoins, that doesn’t mean he paid the pizza guy through Bitcoin, he means that at that time the price of BTC was too low and for that reason he sold so many Bitcoins to collect sufficient money to buy the pizza.
And to your question if Bitcoin has failed or not? Then it’s no. I can easily claim this statement if you see the price of Bitcoin.
At last Bitcoins are also accepted at many e-commerce websites and many other popular services.
So it’s time to start a new era.