misadventurer
misbehaver
misdealer
miseducator
mishandler
defectionist
misperceiver
misappropriator
bungler
querulant
misfirer
misreader
mismanager
misplacer
unfortunate
unfortunate person
misaligner
sympathizer
misapplier
comforter
sympathiser
victim
disorganizer
artful dodger
out to get someone
misteacher
blunderhead
mistaker
sad sack
he who digs a pit for others falls in himself
wronger
bane of someone's life
bane of someone's existence
misdoer
messup
Javert
misdirector
foozler
act up
butcher
obstructive
fuckup
beleaguerer
stumbler
deplorer
botcher
blunderer
bumbler
misshaper
shit disturber
wreck
fumbler
infringer
misengender
misguider
confessor
blood sport
malpractitioner
misadventure
tale of woe
mischance
induhvidual
shit bird
sufferer
bottom feeder
out of luck
incompetent
old sins have long shadows
maladministrator
skid row
doryphore
wet end
stormy petrel
palooka
wrecker
messer-upper
problematizer
jeopardizer
miscegenist
confounder
rock
reversionist
broken vessel
backslider
race mixer
misstater
miscegenationist
recidivist
pain in the ass
infliction
defector
pain in the neck
botheration
annoyance
pain
bother