100 English words for 'In a situation in which one is mismatched with one or more others whose accomplishments, preparedness, or other characteristics are on a significantly higher or lower level than one's own.'

out of one's league

micromania

undermatch

player hater

personality clash

Elo hell

it's lonely at the top

lowling

otherling

underachiever

uneasy lies the head that wears a crown

indiscernibility

glow-down

second-class

overspecificity

humbling

inferior

all sizzle and no steak

impostor syndrome

underestimator

abnormal psychology

contradistinct

poor relation

lesser mortal

in one's own right

underrepresentedness

opposability

third-rater

amateur

deviance

pride

nonequal

over-the-topness

mediocrity

odd one out

rank outsider

misfit

bottler

out of character

unequal

off one's game

underachievement

the grass is always greener on the other side

subexpert

bush league

the cobbler always wears the worst shoes

underscorer

tall poppy syndrome

underpredictor

unalikeness

too big for one's boots

send someone to the showers

opposite

lightning rod

diversity fatigue

indistinguishableness

lag behind

in the land of the blind, the one-eyed man is king

threefold

rinky-dink

double

two-fold

race mixer

dual

three-fold

twofold

often wrong, never in doubt

Dunning-Kruger effect

subnormal

after-

treble

overstater

disequalizer

amateur hour

distinguishability

reject

less than

cull

savant syndrome

social alienation

overpredictor

aberrant

snookered

shortcomer

God hates a coward

slacker

bozo eruption

in spite of oneself

dark horse

muggle

third-class

tenebrose

misplacer

off

underratedness

diverse

overestimator

homophily

various

conceit