Asparagus has tufted compact fronds that eventually turn gray and then to brown as the stalks die back.
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