disimprove
confound
suffer
fall away
worsen
exacerbate
exasperate
aggravate
go to shit
go from bad to worse
poison
take a turn for the worse
compound
rub salt in someone's wounds
dismalize
misalter
do more harm than good
decline
kick someone when they are down
bear the brunt
sour
besour
dub
decay
make heavy weather of
go downhill
pejorate
go through hell
impair
go backwards
crab
oversour
rot in hell
go to pieces
rub salt in the wound
turn
deteriorate
kick a dog when it's down
make a pig's ear of
come to grief
acerbate
heavy
shit up
prill
scuzz up