it's also because people are behaving more and more badly.
I don't think so. Every generation believes that the world is going to hell, but people haven't changed. The Internet has given a voice to everyone, and plenty of them are jerks, but they were already jerks. In almost every measurable way, the world is getting better, not worse.
The world may be getting better, but the internet has gotten worse. I was around in the early days of the web (1996) and BBSes before that. I was also on slashdot in the late 90s (this isn't my original account). Part of what's happened is an influx of general population into what was originally small tech saavy communities. Often oriented around tech, but other communities existed and they were basically islands.
Now with platforms like reddit, twitter, facebook, etc. everything is visible to everyone and a more general population (basically everyone) uses them. So that's one part of it.
It's also pretty clear that people have realized they can use the anonymity of the internet to stir up drama and controversy for their own gain. Whether that's someone creating Twitter drama to get eyes on themselves/whatever they're selling or whether it's state level actors there's definitely a level of manipulation occurring. It use to be limited to "astroturfing" (shilling for products). Now it's a lot darker. It wouldn't surprise me at all if the APK crap was a state level actor trying to sow discord.
Maybe completely free and open communication between everyone in public forums just simply doesn't work at this scale (i.e., it will be abused). I hate to say that as I think the internet is a good thing and I don't like being cut off from information. On the other hand, a lot of people don't have the critical thinking skills to understand when they shouldn't take information at face value and to question a source. And some people are just easily manipulated. Just thinking out loud. I don't know what the solution is.