Most modern moisturisers are built in a lab. Long ingredient lists, names you can't pronounce, formulas engineered to look and smell and feel a certain way on a shop shelf.
And your skin has no idea what any of it is.
So one of two things happens. The product sits on top of your skin doing very little, a film you can feel but not a difference you can see, until the jar runs out and you buy another one. Or your skin reacts to something in the mix, and now the patch that was just dry is also red-looking, warm, and itchy by mid-afternoon.
Either way you blame yourself. You think you picked wrong, or you didn't use it long enough, or your skin is just difficult. So you buy the next one. And the next.
Or you're the other kind. You stopped buying anything at all, decided your skin was just rough and that was that. Same outcome. The shelf is empty instead of full, but nothing got better.
It isn't you. You've been handed lab formulas and told to be patient with them. That's the whole problem.