Technologies in the first instance perhaps work as ways for people to enact hopes and expectations more than realities; that is core to their social impact. The effects of technologies, their affordances, are to a large degree not in some concrete, isolatable causal social change, but in the expectations that technologies become intertwined with from early on in their conception. Technologies cannot be understood apart from what they are imagined to be, unintended consequences included.
This close interconnection between human feelings and hopes made me think of the documentary Social Dilemma again. In the film, one of the main themes is the effects of technology on society and individuals.
The media industry is changing rapidly, and human attention has become the product sold to advertisers. Experiments on users have led big companies to optimal ways to get users to do what the companies want. Over the last few years, psychology has been built into technology, so another important shift in the Internet is that a tool-based environment became addiction-based.
Until recently, middle schoolers did not have access to social networking sites, and their self-esteem and identity did not depend on likes and comments on the Internet. Rewarded with short-term signals, people correlate it with truth, and this is especially dangerous for teenagers whose self-worth had not developed yet.