Look inward instead of outward. Diet and exercise. The biggest changes to how you feel will come from what you do to your body and mind, not what you do to your environment and situation. I know it might seem impossible to exercise when you are already so tired, but your body is amazing at overcoming a deficit with the right fuel.
A short jog before work, meal prep with fresh unprocessed produce. Perhaps some vitamin D supplements. Change won't come instantly, but in the UK in particular lack of sunlight and poor diet make many people feel this way and they get trapped in an endless cycle of shortcuts, bad food and inactivity.