From your question, I don't understand what it is about observing Yom Tov that is so draining and depressing. Is it the problems with missing work and getting behind? Why is it so difficult to avoid switching on and off lights? Maybe you need more Shabbos lamps? Or is it the food? The lack of things to do? Maybe keep searching for things you enjoy doing (perhaps certain seforim you haven't learned before -- there's amazing array now, everything from frum novels and biographies to inspiring hashkafic books like those of Rav Arush). Going on an hour walk each day is another option... —
Kordovero 2 days ago