НИ ПРИ ЧЁМ2 остаться collPrepPInvarsubj-compl with остаться (subj: human) one is left without anything at all, usu. without having attained sth. desired or expected
X остался ни при чём - X was left with nothing
X was left out in the cold.
Всем дали премии, а я снова остался ни при чём. Everybody else got a bonus, but again I was left with nothing.