checkered
hit-or-miss
wicked problem
slippery
flaw
blemish
lameness
mutilate
instability
flukey
flawed
changeableness
conflict
variable
second best
yo-yo mode
caprice
repugnance
diversity
nonpredictability
interfault
choppy-changey
dilemmalike
sickness
alogism
impersistence
versatile
multiproblematic
flawy
failure rate
fumblingness
too clever by half
kutcha
irreconcilable
alterable
volatile
bathtub curve
crab
all over the place
snag
a foolish consistency is the hobgoblin of little minds
defectibility
mental gymnastics
confusability
dilemmaticity
incomputability
mobility
throw a wrench in
erratic
fritz
volatility
confuddled
incorrect
multistable
uncompatible
chopping and changing
raging
maladaptable
mess up
have one foot on a banana peel
unpredictableness
unpredictability
hair-trigger
inconsistentness
fault
inconsistency
lability
banjax
fallibility
no-win situation
vagary
abnormality
limitation
tipping point
discongruity
unevenness
wrinkle
defect
paraconsistency
inelastic supply
variationality
incompossible
overchange
changeability
malleable
multideficient
impredictable
unstable
irreplaceability
brittle
weakness
failing
unadaptability