shapeless

defaced, disfigured

aberrant, abnormal, freakish, mutant

asymmetrical (or asymmetric), crooked, disproportionate, irregular, lopsided, nonsymmetrical, overbalanced, unbalanced, unequal

horrible, horrific, terrible

ugly, unattractive

characterless, featureless, nondescript

chaotic, disorganized, incoherent, systemless, unordered, unorganized

dim, fuzzy, hazy, inchoate, indefinite, indeterminate, indistinct, indistinguishable, murky, nebulous, obscure, unclear, undefined, undetermined, vague