another string to one's bow
ineffective
inefficient
failable
clumsy
ragged
incompetent
fumbling
bungling
the jug goes to the well until it breaks
hopeless
capacity
rusty
out of practice
unartful
unskill
conquest
hand
brush up
ham-fisted
technique
do-or-die
remedial
tekkers
unability
failing
failingness
weak
fail
skillessness
string to one's bow
skillful
touch
have one's fingers all thumbs
abilitation
prowess
fight a losing battle
Jenga
skill
doplic
unskilfulness
futile
difficulty level
thumbscrew
expertness
subtlety
enmesh
pull oneself up by one's bootstraps
incapableness
reskill
find out the hard way
microskill
inability
miss
copout
pons asinorum
grapple
ease
cope
deal
run to waste
manage
make do
proficiency
wherewithal
contend
get by
built different
make out
mutton-fisted
worst
incompetence
lay an egg
stultify
impairment
unable
handicap
disablement
disability
unably
you're only as good as your last shift
lubberly
suppletory
the cobbler always wears the worst shoes
trickiness
waterproof
rude
adeptness
noncompletion
defect
deft-handedness
jockey
lose one's touch
drop the ball
clumsiness
be riding for a fall