It's not a waste of time, you live once, you die forever, once dead, you will have all the time you have lost in life. Anyway, even if this life sucks... it's the only thing we have to feel, often we fall on depressions but normally people that is able to be online posting here, they are often better than 90% of the people on the world, you probably have food and everything you need, and you can do much more or much less as you please. Bad feelings/depression often blind ourselves, so be happy and motivated even if you are depressed, those bad and good feelings are just like leaves moving by wind, they come and go as they please. Often our depression and lack of happiness is caused by our gens and survival instinct.