JD it’s some and some, the compost quality depends who made it and how old it is.
5 years ago I had the same experience as you, buying “farmyard manure” to find woody compost. V dishonest.
As Tris says, it’s good, eventually.
I would use it 50%, with animal manures underneath.
Incidentally you don’t need 6in if your weeds are under control. For a start out, 2-4in is good, on weeded or lightly-weedy soil.
