give him enough rope and he'll hang himself
self-annihilate
shoot oneself in the foot
fumble the bag
be one's own worst enemy
bite the hand that feeds one
menticide
self-guilt
self-abuse
self-destructively
self-sabotage
saw off the branch one is sitting on
self-destruct
make an ass of
burn one's fingers
make a fool of
fool's errand
felo-de-se
autonomousness
exploit
self-harm
destruct
roaster
self-delete
suicide
self-deletion
mistake
tie someone's hands
abstinence
self-destruction
step forward
make an exhibition of oneself
autodarwinate
mislead
wish one joy of it
self-renunciation
abduction
abandonment
stand in one's own light
unself
scuttle
self-reliance
cut off one's nose to spite one's face
reap the whirlwind
pay the penalty
self-reproach
agency
think no end of oneself
guilten
fooling