The mundaneness of the day job suddenly hits you. You keep on going to work because someone has to pay the bills? But you can’t concentrate on anything at work. Whatever you choose to focus on becomes blurry. You can’t help but think, “this is not me. I feel so bleh”. Congratulations - you have successfully burnt out.
Burnout is a state of complete mental, physical, and emotional exhaustion caused by chronic workplace stress. Because of this, people can feel overwhelmed, hopeless, and cynical and might find it hard to work and maintain relationships.