fan the flames
do more harm than good
kick someone when they are down
impair
compound
disimprove
make one's bed and lie in it
exacerbate
twist the knife
make matters worse
worsen
suffer
pejorate
kick a dog when it's down
up the ante
drop someone in it
misalter
aggravate
confound
fall
disconcert
begin at the wrong end
add fuel to the fire
rub salt in someone's wounds
take a turn for the worse
compensate
sap
rile up
lean into
pay
crash
compare and despair
go to pieces
caseharden
take on water
add insult to injury
force someone's back to the wall
crush
weigh on
Indian wrestle
upend
fall apart
gun for
decline
snarl
catch a cold
reap the whirlwind
take one's lumps
tatter
have one foot on a banana peel