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