I think it's less the network's fault, and more on where someone chooses to spend their time on the network. If you're on Facebook, it is in their interest to piss you off so you stay and fight. But plenty of other tools exist to connect folks online without being manipulative.

It's like fire, nuclear energy, or most any other tool. Use it right and everyone benefits, use it wrong and people get hurt.

Yes but we can't tell if that's caused by being online, it's possible you'd have had the same problems anyway or possibly worse. For all we know the internet helped you deal with your issues and without it you'd have ended up a serial killer.

Life is just very complex.