NOTE: Ni commonly follows darō, deshō, and V-tarō, and essentially has the same meaning as no ni although the latter is more common.
Hoka no hito ga yattara, motto hayaku dekita deshō ni.
Despite the fact that it could have been finished much sooner if someone else had done it [unfortunately that was not the case].
「It could have been finished much sooner if only someone else had done it.」
Mō sukoshi matte itara, ame ga yandarō ni.
Despite the fact that if we had waited a little longer, the rain might have stopped [we didn't wait].
「If only we had waited a little longer, the rain might have let up.」
Hope this helps!
°˖ ✧◝(○ ヮ ○)◜✧˖ °こゆうきあいはら°˖ ✧◝(○ ヮ ○)◜✧˖ °