Using social media too much fosters terrible habits and form character development problems for a person. For example having low-social skills and unhealthy addiction to it.
As far as in concerned, i believe that having daily usage limitations is crucial. For example student who spends most of their time on social media platforms, having online friends mostly, not interacting with people in real-life situations can bring negative changes of communication skills development. Person who is only used to texting, and isnt used to talking face-to-face, is a problem, because its essential to be communicative, because theres a lot to talk about in this universe.
Secondly, unlimited usage of technologies such as artificial intelligence can be also harmful. From my point of view i think a line should be existed in every topic, crucially at using socials and technologies because, it can not only give positive changes, but also negatives. For instance person who uses AI mostly to do their essay, homework, creating other stuff may kill the creativity of the person.