The word Alphabet didn't go away when Google renamed their parent company, and I'm confident that the word meta will also prove stronger than its SV appropriation.
either way they should go with 'Metaspace' or 'Fluppy pups International' since everyone loves puppies
And anecdotally, IG users seem to feel very positively about it in a way that isn't true for fb or Twitter users. Most of the handwringing about IG that I've seen comes from commentators
You are right about WhatsApp though, it aslo largely has a very positive image till now