Can we talk about how it is impossible to maintain "work life" balance when you work 40 hours a week?

I don't know, maybe some people don't have a problem, but I can't help but feel like I'm literally being robbed of my own free time. Is this normal? I only have two days a week that I get off and by that time I'm exhausted from rushing all week. I work in the service industry but I'm expected to be as productive as a tech startup employee (essentially). I'm cracking and need some reassurance that this is normal.