Probably not even about whether it was good enough at all, just random managers making random decisions by how they were feeling the day they interviewed you. Any time a company has a LOT of applicants, like any big tech company does, the less you should take any info at all from a given rejection or even an offer. It’s kinda random.

You’ll typically get better info only when a company is small and has a role in low demand and they only had a couple of people apply. This situation is pretty rare.