This will damage millions of businesses

I don't think that shifting conditions and fluctuations in a market place are damage, I think that it is just business.

destroy the livelihoods of countless creators across the country

I believe that any creators making a livelihood from social media are not doing it solely from TikTok, they are (or at least should be) diversified across multiple platforms for stability and increased earning potential.

deny artists an audience,”

I'm not even sure what this is supposed to even mean. TikTok is a platform, not an audience. The audience is still there. The artists are still there. A vast multitude of options that are not TikTok exist for connecting those 2 groups. Nothing is being denied.

Basically, as it was before TikTok, so shall it be after TikTok.

Really this is just a big handout to Meta and Google with nothing beyond that of merit

That may be, but TikTok did not argue against the consolidation of social media platforms. That would be a different discussion.