underattainment
shortcoming
shortfalling
hardscrabble
underperform
ambitionless
underachieve
unambitious
infraoptimal
falling
less is a bore
unattaining
begin
fall short
more is more
decrescent
to little avail
wantum
suboptimally
slippage
subassertive
backward
tentativeness
short
wanty
dissatisfactory
velleity
unsatisfying
disappointing
sneak in
exiguity
lowset
demotivated
meagreness
deoptimize
poorness
submarginal
scantiness
meagerness
leanness
low-set
scantness
be careful what you wish for
minimalness
hypolobated
nondifferentiation
subfunctioning
shabby
subviable
shitty
lowth
underdeviation
lowly
unattainment
fail
ambitionlessness
underdo
disadvantage
dwindling away
small time
downtrend
trail behind
unstudied
off
dwindling
comedown
ungetatable
un-get-at-able
subnormal
un-come-at-able
low
poorly
unrealized
negligibleness
no screaming hell
directionless
unmotivated
bottom out
negligibility
slip through
shiftless
slenderness
subabsolute
unoptimized
insusceptibility
depth
depressed
ungainable
leave a lot to be desired
punch below one's weight
lesserness
nonoptimized
dissimilate
miss
lessness
subproportional
desirelessness
underachievement