Because their parents are incompetent asshats who turned them into annoying little monsters and let them do what they want without taking responsibility for their hellspawn.
So in a way I don't hate kids. I just hate their idiotic parents.
I started to go running regularly about a year ago.
Two years ago I was still very overweight and would basically collapse if I had to run to catch my tram.
After I lost about 30 kilos I was able to run close to 4km in one go.
Took a bit of a break during the winter and spring, now I am working...