Actually, this just sounds like Life @eveuncovered as we all just feel a bit of 'meh' overall. Before the internet, where we are always meant to be 'on' and to present our idealized self to strangers we'll never meet, people felt this way. And even before that, with TV as the focus, this was a normal thing as well, as the box also gave us 'examples' of what LIFE is supposed to be, only problem there was all problems arose, were exciting and were fixed in 30-60 minutes.
And before TV the Movie and radio aided us into what we thought LIFE is, not as servelely but surely on that path.
Really, days are simply a construct of our need to organize life into a pattern. The 'need' to fill each 'day' with a certain number of well achieved goals kind of sets us up to feel bad sometimes, but really just being and doing and even just feeling sort of bleh is part of just being a living being.
Sometimes the MEH bits of life can be quite good when we look at the overall picture of living whilst in the midst of it. Now, sit back do nothing and dream about buying a 5th nail colour ;)