My friend's boss made a huge mistake by tying up with an event management company. The whole purpose of the tie-up was to promote his company but it failed miserably.

我朋友的老板犯了个大错，他把公司和一个活动管理公司合并了，本来合并是为了提升他的公司，谁知道最后竟是悲惨的结局。

youdao

There is no possibility of a victory plan that has been carried out, but failed so miserably.

一个没有胜利可能性的计划就这样被执行了，而且以惨败告终。

youdao

Other Dances they tried but Failed Miserably-Salsa, Bolero and Mambo!

FORBES: Four Reasons Why Dancing with the Stars is Losing Viewers

The stated reason for QE-2 was to lower long term interest rates but it failed miserably.

FORBES: Bernanke's Tea Leaves Read Unintended Consequences

Just 25 minutes remained before tea and it was critical for England to reach the break unscathed, but they failed miserably.

BBC: Australia charge thwarted by rain