In none of the companies I've worked, not completing any tasks would've worked. However, it does work to not do anything for three days and finish it all on the

In none of the companies I've worked, not completing any tasks would've worked. However, it does work to not do anything for three days and finish it all on the fourth. You can always say you got stuck on one problem while you were actually just slacking off the whole time. And then I'm not sure I see the problem. If OP still produces the output without investing the same amount of hours, his peers don't suffer and shouldn't have a reason to complain.