After going through at least 6 mattresses in my life, and reading countless reviews, I've come to the conclusion that there is literally no such thing as a good mattress. Or even an ok-ish mattress. They are all bad, they are all designed to last for no more than a week, they are all over priced wastes of money.
The mattress I used to have as a kid is long gone. The great sleep I had from childhood to early 20s is gone.
I will never have energy again.