I've probably made a botch of things.

我可能把事情弄糟了。

I'm afraid the unexpected accident may botch up the dinner tonight.

恐怕这意不到事故会把今天晚宴搞糟。

The terrible mechanic seems to have made a botch of repairing the car.

这个糟糕机修工好象把这辆汽车越修越坏。

I've made a botch of it.

我把那事做坏了。