I think the last 2 years have been a tipping point where people have felt caged and agitated. Add to that the lifestyle most are used to and having it whipped away, restricted, ruined time with families and no holidays etc. Then people being laid off. Stress levels rising. Most (not all) of the modern generation tend to crumble under any sort of pressure these days, and then add to it there's more visibility on social media platforms. All of this added to the government who haven't covered themselves in glory (I'm being polite) and the modern way of life in that everyone expects everything NOW, this minute and you have a perfect cocktail for the general population getting aggressive. Instead of being a more peaceful time, we seem to be of the belief that "well they're doing it so I will" or "They're getting away with it, so I'll do the same".
The other big thing I've personally found is that no one wants to take ANY responsibility for things they do. Always someone else's fault and, if challenged, they get defensive and aggressive. Car parks...someone bangs their door on your car and you point it out...somehow its your fault. That's just one example.