"I'm underpaid and have a brutal schedule so I'll take all the shortcuts". Hence their 'dump and run' delivery style. Also the large quantity of piss bottles on the roads to their depots. I can't really be annoyed with the drivers when Amazon's system squeeze every drop of work out of their drivers and warehouse staff. But, ultimately, we're to blame because we want free delivery for all the rubbish 'we' order online.