Not without a solid result establishing so. But good luck with this, you'd probably need to compare our world with internet and a similar enough world but without it, which does not exist.
In any case, internet can't be reduced to "tiktok et al"
TikTok may indeed be a contributing factor to the current collective brain rot, but I’ve learnt more so far from YouTube and access to random PDF documents on any technical subject I can imagine than I probably would have done in one lifetime without.
Not without a solid result establishing so. But good luck with this, you'd probably need to compare our world with internet and a similar enough world but without it, which does not exist.
In any case, internet can't be reduced to "tiktok et al"