"the grass is always greener on the other side": The others' circumstances seem more desirable.

give somebody the cold shoulder, look at with disdain

a 家紋 (kamon, “family crest”) design featuring a star shape similar to a Star of David

Used other than figuratively or idiomatically: see 三, 枚, 目. (the third sheet or other flat thing) / a comic character / (by extension) a funny or ridiculous person

bystander's vantage point

onlookers see more of the game than the players do

ski mask, balaclava

not serious, nonchalant, trivial

lack of seriousness

main, important / valuable / notable