worsen
confound
disimprove
aggravate
exasperate
exacerbate
suffer
fall
fall away
compound
go from bad to worse
pejorate
take a turn for the worse
deteriorate
dismalize
go to shit
impair
go backwards
shit up
kick someone when they are down
rot in hell
poison
go downhill
infortune
come to grief
rub salt in someone's wounds
make a pig's ear of
do violence to
do more harm than good
poop on
skunk
decline
reap the whirlwind
mess
drop behind
do one's worst
go to pieces
outblunder
turn
pay
hit one hard
make heavy weather of
sour
eat shit
besour
screw up
scuzz up
fan the flames
kick a dog when it's down
undergrub