Hindi translation-help needed!!?

"They so got upset on a trivial matter and walked away...as if they were searching for an excuse since ages."

I have used plural 'they' for 'woh'/'unhe'...as this is honorific term for 'she/he', as used in the sentence!

chhoti si baat = trivial matter

yun = so

rooth ke = got upset/mad

chal diye = walked away/left

jaise = like/as if

sadiyo = centuries/ages

kisi = some

bahana = excuse

talaash thhi =were searching/looking for