Playing, resting, daydreaming—all are not a waste of time. Only feeling guilty for doing these things is a waste of time.

People are the purpose of everything. Your studying, striving, and progress are to make your life better. If you feel unhappy because of these things, then you are going against your original intention. So, whether you're happy or not, and regardless of how your day has gone, it's all good—just accept it.
You are not lazy; you are just tired.
Confucianism's heavy influence has always made people laborers who don't know how to rest. Don't let Confucian thoughts affect your mindset. Eat what you should eat, drink what you should drink. $BTC