That's his own fault that he got scolded by the teacher because he broke the window.
この場合、次のような言い方ができますよ。
ーThat's his own fault that he got scolded by the teacher because he broke the window.
「彼が窓を割って先生に怒られたのは、彼の責任だ」
to be one's own fault で「人の責任・落ち度である」
ご参考まで!