scuttle
antipositional
come the raw prawn
spike someone's guns
poke the bear
sabotage
counteract
self-sabotage
burn one's bridges
shoot oneself in the foot
get in someone's hair
discompose
misempower
cheek up to
obstructivism
cheek up
damn by association
coerce
muscle in on
it's an ill bird that fouls its own nest
non-aggression principle
spot
strike
impoverishment
tie someone's hands
stain
smear
blot
smirch
self-renunciation
extort
tin god
ratfuck
treacherous
destructive criticism
saboteur
cut off one's nose to spite one's face
dragoon
challenge
subversive
manipulation
self-destruct
assassinate
use
self-incriminate
tyrant
perversion
self-own
unlock
comb someone's hair the wrong way