not cut out for

• unsuitedNot appropriate for
• unfitNot suited for purpose
• wrongContrary to fact
• inadequateNot sufficient for purpose
• ill-equippedLacking necessary preparation

mismatched · struggling · failing · floundering · square peg · awkward · incompatible · hopeless · lacking · deficient · overwhelmed · outmatched · incapable · unqualified · talent · calling · vocation · destiny