The age dynamics of Roblox, Fortnite and so on are not good, nor Tiktok or X.
There are endless adult losers on these apps, some in their thirties or beyond, grooming children. Also, many attack children in single digit ages based on politics and social media dogpiles (some even go around barking at what hairstyles little children should use on their avatars, box braids being 'racist'), blackmail for money, hate accounts targeted towards one person and other things. Parents are also just blinded to these.
Instagram in my opinion is actually the worst cesspit by far concerning these issues but due to the fact "the beautiful people" use it and due to the fact many of the most aggressive on there are young 'glamorous' subaltern individuals who have closed circuits of massive sexual abuse tied to gang activity, that will only come out in the wash in years.