way out of a paper bag
useless
lift a finger
uneffective
tagmeme
underachieve
waltz
poor power
velleity
easy
worst
incompetence
miss
unfulfillment
non-
skillessness
pauce
unskilfulness
unskill
lay an egg
dejection
near miss
semiweak
inexertion
ham-fisted
strike out looking
ineffective
insufficiency
inability
inadequacy
underwhelm
inefficient
unartful
weak
unskillful
remiss
indirection
underplacement
outskilled
hopeless
dyscompetence
the cobbler always wears the worst shoes
unaccomplished
bite the big one
failure
slash and burn
semiskilled
languish
fake the funk
underinstruct
fink out
another string to one's bow
cop out
coaster
underchallenging
dearthful
indexterity
unambitious
innocence
weakness
impuissance
improficiency
to save one's life
helplessness
underdo
nonproficiency
ambitionless
unproficiency
underperform
slip through
run to waste
truck
incompetent
nontechnique
nonsuccess
play at
clumsy
bungling
fumbling
go nowhere
evade
nonverbal intelligence
duck
lightweight
circumvent
picayune
bring it weak
trivially
dodge
fudge
amateur hour
elude
emptyhandedness
difficultness