I think the myth is the misinterpretation of scale. People tend to believe social media is primarily hate and misinformation, that most users are simply addicted to it like dope fiends, and that it's nothing but echo chambers, etc. All of these things are true, but likely to a lesser degree than assumed.
Agree, the negative part is disproportionately impactful.
As an analogy, my g/f and I recently went grocery shopping. As we got out she was fuming at how old people completely ignore COVID rules, whilst society is largely making sacrifices for them.
I was part of the whole experience, and two people ignored the rules. One did not have a mask, another did have one but ignored social distancing.
There were probably some 200 people in the store. So actual reality is that almost everybody complied. But it takes just one or two that don't, to make a sweeping conclusion like that.
Exactly my thoughts. OP needs to read _Thinking, Fast and Slow_ and/or _The Scout Mindset_. Actually COVID as a whole has been yet another revealing of the amazing ability of the irrationality of humans and our failure to understand statistics, numbers, and growth rates, large and small.