Plus some people just need more sleep than the 8hr average and need to wake and work later than most in society. I for example, have just slept 11hrs and woken at 11am, but I will get more done than if I had woken at 7-8am.
AFAIK almost everybody procrastinates (more or less), but not so many people are suffering from depression.
I don’t think that shitty tasks themselves can cause depression; it’s all about the social context of the work you are doing. Is your boss bullying you, or telling you that you are not important to the organization, or does she try to punish your mistakes? Are you working just to support a study you are not really into, because you think you owe it to your parents? Is there another job you would like better, but you dare not change jobs because you are afraid you won’t earn enough to support yourself? That’s the way to get depressed about the tasks you are doing. Sort out the social context, and you might even realize afterwards that the tasks were not so mundane after all.