submediocre
below average
wusser
submediocrity
exasperating
aggravating
exacerbating
deteriorating
tant pis
suboptimal
disimprove
aggravate
exacerbate
worsen
exasperate
fall away
mediocrely
suffer
deterioratingly
baddish
downhill
worse
go to shit
sixth-rate
decline
pish
poison
dismally
go from bad to worse
pessimal
terrible
confound
lousy
worstest
dismalize
horrendousness
fourth-rate
worst-case scenario
craptastically
abominable
take a turn for the worse
rotten
freefall
mid
woegeous
jialat
icky
worsener
modified
limited
stinky
dire
crappy
shitty
rueful
miserably
stinking
teeerrible
depressoid
suck donkey balls
suck a big one
suck balls
turn
suck tits
dog shit
so-soish
fifth-rate
shank
rough end of the pineapple
made of fail
cod
suck
mediocritist
degeneration
mediocrist
godforsaken
for the worse
miserable as a wet hen
suck donkey cock
worstly
the cure is worse than the disease
deformation
stink on ice
depressingly
worstness
disimprovement
crapass
distortion
nerfed
crook