The majority of people are good - I truly believe that. The problem is we only hear from the loud ones who are usually not so good.
Most people are not using their head or thinking at all, they are just following the herd and repeating what other people said on TV or on social media.
I wouldn't consider people as bad or good, but it's obvious that only a small percentage is capable of making meaningful conversation and accept opinion of other people.
Making a true decentralized, unmoderated usable social network is almost impossible knowing human nature.