Let me put it this way, bud:
The things highlighted by your video are, by and large, fairly common occurrences on the road. As such, you should stop thinking of them as "bad driving" and start thinking of them as "normal driving".
Should drivers do those things? No, in most cases not.
Are those drivers breaking the law? Yes, in many cases they are.
But...
Should a driver expect to witness those things? Yes, he absolutely should. They a normal part of everyday life on the road. Get used to it, get over it, get off your high horse, get off the horn.
Plus, I don't see any reason to believe that the skill level of the driving public used to be better than it is now. When I was growing up, 25 years ago, I frequently saw people running stop signs, driving 10 mph down residential streets, failing to signal for turns, not keeping right on the Interstate, all sorts of things. If anything, the frequency with which I've witnessed such things has diminished rather than increased.