Yes, as a rule - though I agree with pp who have explained about it not being a constant state of euphoria, but more a sort of 'contentment' and that some times it lifts from 'contentment' to real joy, but obviously the day in, day out life isn't all sunshine and roses.
I also agree with a lot of it is about your attitude. I mean, obviously there are some individual, really sad, or really challenging circumstances people have to cope with, but for most of us we go through life with a fair mix of ups and downs.
I have had bereavements and illnesses and failures and disappointments like everyone else, but accept that is part of life. I accept I grieve because I had someone I loved. I got cancer and didn't think "how terrible, why has this happened to me?", I thought "thank goodness I thought to check my body, and thank goodness we have the NHS and that the GP referred me and the breast clinic saw me quickly and then I had all my treatment - FREE.
I think there is a lot to be said for having a "glass half full" attitude in life, but I also think you have to take hold of your own destiny sometimes.
So, in the OP, you say I go to work and I don't care about any of it. I'm not motivated to do well because none of it means anything to me. Then I go home and do nothing and get up to go to work again.
What are you doing to change your work situation ?
Why do you 'do nothing' in the evenings ? 
I do loads of things. I am involved in things that I enjoy, and then I meet friends who also enjoy them. It makes life enjoyable.