I feel the same.
I have at least one day per weekend where I can't muster up the motivation to do anything. The fact that weekends are only two days feels depressing, knowing I lose at least one day to recovering from the workweek. It's so unfair. I work to live and yet, my lifestyle suggests the opposite. I feel like most of what I do in my free time is preparing for and recovering from all the energy (and money - like fuel, foord for lunches, buying snacks because I crave them, clothes that are appropriate for the office, maintenance on my vehicle because I use it more often when commuting) I use up just for work.
Add to that the following as well: I lose sleep, because I can never fall asleep early enough to get a solid eight hours before I have to get up again to leave in time for work. The time that I spend in the morning and the evenings to get ready to leave and to prepare for the mornings so my routines are easier when I am still groggy.
Then there is the willpower I use from doing tasks that are boring, but still need to get done, to switching tasks, to being interrupted, to having to drown out other conversations around me that do not pertain to make work. I have little left for myself.
To make a long story short, My employer drains me. They take so muchy from me and refuse to pay me properly in return, despite the fact that I have gotten more experience and am now more productive. I have started to resent them. Even if I switch companies, a year or two down the line I will be in the same place. I hate it!