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