Yes, tiktok harms therians, I've been on tiktok a while and there is so much misinformation it kinda makes my head hurt, it makes so many people hate on therians when they don't actually know what therianthropy is.
Personally i like doing quadrobics, but only for fun, it doesn't really make me feel connected to my kintypes, running through a forest on all fours make me connect just as much as running through a forest on two legs, I understand how it does help some people connect to their kintypes, it's just annoying how people are called fake therians for not doing it.
Oh and the tiktoks where 'therians' talk about their past lives... ahahah- I saw a tiktok of someone who said they used to be a cat and lived in a clan, not a clowder but a warrior cats clan, the cats also had very warrior cats sounding names which is pretty unrealistic because last time i checked stray/feral cats don't have names, it was a video where they were searching for another cat from their past life and there was so many fake therians in the replies saying they remembered it(around 300 comments)
There are some good therian tiktokers but the majority is just kids roleplaying and seeing it as a trend, not even knowing the actual definition of therianthropy.. The best thing to do about this is to educate them and hope they'll listen