Because you have a destiny and a purpose way beyond your current comprehension and it is so much bigger than whatever misery you are feeling at any point in life. You have to find what that destiny and purpose is, believe me, because otherwise it would only be a massive opportunity squandered. Let me explain - you are the universe itself, so incredibly lucky to be able to come alive, with an opportunity to experience and appreciate the universe itself, there is a much bigger connection you have to the stars and to all that has life. If you are true to yourself and chase what your heart desires and remove all the noise, you will find your purpose, also called self-actualization. Not to mention you are living in the most comfortable, connected, beautiful time any species including humans was ever afforded. On separate note, it is very understandable and valid if you feel like shit given the current affairs, but if you believe me, this had to happen, and this only means better times will be here sooner rather later.