Earlier quoted context omitted.
In my case, someone who thinks that it dumbs-down the population, leaving them in an echo chamber of made-up bullshit, lifestyle signalling and narcissism. My position does ignore the positive aspects of Facebook like finding old acquaintances, coordinating social events etc, but then even cannibalism has its bright sides.
Don't live the life of others, is not your problem.
> is not your problem
You're wrong on both counts. Having an opinion regarding a social media platform, particularly one that can affect the fabric of society, is totally reasonable on a discussion forum hosted on Y Combinator.
It's no more living the life of others than having an opinion on war, politics or famine.