Major life hack: Don't complain, ever. Nobody likes a complainer. They drain the energy of everyone around them. It's exhausting spending time around someone who constantly complains about things outside their control. If it's within your control, go do something about it. If it's not, you're just wasting energy thinking about it. Complaining gives too much power to the thing. Take back that power.
Ten lazy years can disappear the moment you lock in. Six months of discipline can erase a decade of drifting. Momentum is magic. It turns yesterday's failures into tomorrow's fuel.
My therapist told me that this is normal and that you can't rely on your youthful energy to drive your motivation forever. You have to find another source of power from within.