Daniel D'Addario Chief TV CriticThis review contains spoilers for the plot and ending of “Squid Game.”To American viewers, “Squid Game” may seem to have emerged from nowhere. But it is a pretty unsurprising smash hit.The show, which Netflix chief Ted Sarandos has said is on track to become Netflix’s most-watched series ever, has dominated charts the world over, serving as striking proof positive of the streamer’s global strategy.