NASA's had its own bad luck on Mars, of course. In 1888, the Mars Climate Orbiter crashed into the planet rather than orbiting it because imperial measurements were used in its thruster controls rather than metric. Oopsie.
ESA’s approach to landing Schiaparelli was simple compared to that used by NASA’s Curiosity rover. If any landing were to fail, you’d expect it to be the ridiculously complex Curiosity landing. But that one succeeded.