What exactly is "Libs of TikTok"?

I haven't seen much of it on YouTube, just a reaction video here and there,

But from my impression its just a channel/profile that re-uploads what people post on TikTok

If this is the case, why is everyone so angry about it? its literally just showing the content that these people create 🤷


Tho, if anyone wants to share, I am open to different view points
Maybe I'm missing something?
I dunno