Q.Newly Planted Two Year Old Asparagus Crowns Are Not Thriving
Asparagus has tufted compact fronds that eventually turn gray and then to brown as the stalks die back.

Certified GKH Gardening Expert
These articles should help determine what went wrong:
https://www.gardeningknowhow.com/edible/vegetables/asparagus/asparagus-crown-root-rot.htm
https://www.gardeningknowhow.com/edible/vegetables/asparagus/planting-asparagus-how-to-make-an-asparagus-bed.htm
https://www.gardeningknowhow.com/edible/vegetables/asparagus/cutting-asparagus-foliage-back-in-autumn.htm
https://www.gardeningknowhow.com/edible/vegetables/asparagus/asparagus-ferning-out-early.htm