Earlier quoted context omitted.
Two consecutive quarters of negative growth is the standard definition used around the world. Except in the US today.
Current economic metrics are all over the place following the worst global pandemic in a century. It's true that the metric(s) typically used to define/measure growth are down as you describe, there are lots (and lots) of related metrics that say something quite different. I think overall it's most accurate to suggest that we're in a strange time indeed, not just a repeat of the last 3 or 5 recessions.
The NBER has never failed to call a recession on 2 quarters of negative growth in the past, including during the very same pandemic we are now exiting, which was also a pretty strange time. Past recessions have involved other circumstances, too.
It's literally called a recession because it is a time when the economy is receding. If I had said "depression" or "financial crisis" you could argue that we don't have one of those.