We asked where you sleep differently, because almost everyone with insomnia has one of these.
The hotel where you somehow sleep fine. The couch you pass out on at 9, before lying wide awake in your own bed at 11. The beach vacation where you slept like a different person, and the first night home where it all came back. Or none of them, because you sleep badly absolutely everywhere.
Whichever one is yours, it points at the same two facts. Your body still knows how to sleep. The switch is not broken. And something about your nights at home keeps the alarm switched on. That something is physical, it is measurable, and nobody has ever told you about it. The next sixty seconds are that explanation, and it is the reason everything on your tried-it list failed.