It’s not a failure, though. Clearly not. Obviously not. To call this a failure is flat out insane. It has no connection to any reality.
Also, it’s not a dichotomous failure/success condition. Some things worked, some things didn’t. That’s the actual situation. That much is obvious. It seems they actually managed to fulfill all the primary goals, though you will probably have to wait for the published papers to assess the quality of the collected data. Could take a couple years.