There’s probably around 1-3 things that are priority but 101 things that you could be doing.
So of course you do the 101 things that aren’t particularly important and spend the day flitting between them all. But then later comes, the things you should have been doing are now even more urgent than they were earlier when you had more time.
You got so caught up in things of little significance that you barely have the energy left to do what actually needs to be done.
More often than not you’ll get it done but it won’t be as good as it could have been, not by a long shot.