I knew I was going to quit my job someday, but I didn't really want to leave my job like this.
この場合、次のような言い方ができますよ。
ーI knew I was going to quit my job someday, but I didn't really want to leave my job like this.
「いつかは仕事を辞めるとわかっていたが、こんなふうに仕事を辞めたくなかった」
to quit one's job「仕事を辞める」
to leave one's job「仕事を去る」=「仕事を辞める」とも言えます。
ご参考まで!