The full name is "severe acute respiratory syndrome coronavirus 2".
It is not mild, nor has it ever been. They don't call it MARS-CoV-2. It would be a very confusing name anyways because we live on Earth, not Mars, btw. And I don't think the Martians would appreciate being unluckily associated with this virus.
Also like 700 people worldwide died and we were talking about it for years.
Now covid has killed well over a million people and you barely hear a peep. It's incredible.