I reached a point where I need two of a certain item to do a mission. To get that item, I need to find it as a random drop in a previous mission. I've done that mission like a hundred times and I haven't gotten that item. And since you can only do missions every now and then, I haven't made any progress since the day before yesterday.

So yeah, I'm done with that. :P Not really worth sitting there clicking "accept" over and over and over for no progress.