In your first weeks, everything is new. Your muscles are waking up, and you see changes quickly.
Then your face adapts. The muscles get stronger and the routine gets familiar. Without new challenges, progress slows down, just like doing the same workout at the gym every day.
At the same time, your face keeps changing, with the seasons, with sleep, with stress, with age. The face you have in six months isn't the face you have today.
So women do one of three things. They repeat the same routine and plateau. They jump between random videos with no plan. Or they stop.