hard-nose
tough cookie
nonadherent
struggler
disagreeable person
tough-mindedly
unpleasant person
tough-guy
weakling
bonehead
hard-nosed
teugh
steely-eyed
nowt
dogmatist
bad apple
gabbadost
unhandy
lumpkin
boffin
schlemiel
sneak
feather merchant
bohunk
ball of fire
hardhead
jack of all trades, master of none
bosspot
hardo
bully
brazenface
stubbornness
obstinacy
amateur
black sheep
obstinance
unfussable
mulishness
rooster
spacky
spack
mammet
obdurance
honyock
tough-guyness
ne'er-do-well
yutz
overbearing
heel
squib
dudette
inefficient
intractableness
schlub
incompetent
tower of strength
adamantine
wet
wimp
arse
incompetent person
smooth operator
intractability
cumbersome
toughie
stick up one's ass
GI
weeniehead
mad dog
pervicacious
bulldog
steely-spined
asswipe
nonachiever
sadfuck
thruster
ruffian
ineffectual
wuss
battler
pusher
discomposure
Dalek
paper tiger
soft
like a bull in a china shop
maladroit
scrub
foolhardy
jabroni
hard case
butterfingers
searching
submitter
trenchant
doctrinaire
pepper pot
lost soul