They flag comments and posts that, according to them, go against the philosophy of the community and blah blah.

actually 'liking your own comments' or that you should value posts above author would be one of those blah blahs, you think talking about social guidelines is unnecessary? I see there is a difference between flagging and talking ethics, but if someone is behaving in a way that you just don't want to tolerate you should be free to act accordingly.

Anyway, one interesting conclusion I get is that the root of the problem is people, not platform.

Worst. Conclusion. Ever. to be fair @dwinblood expresses a similar thought when he says "people are not ready", but it is in fact an argument you hear for bad ideas like original socialism all the time. It sounds to me like "We just have to convince them and then everyone will agree with us" at least when it comes to political ideologies.