offmessage

to miss an almost unmissable shot

he totally offmessaged that shot. How could he offmessage that?

Offmessage

Adjective: To miss an easy shot when the odds are in your favour, or to make critical hits when the battle is already won.

Noun: One who misses easy shots, but makes unnecessary criticals.

"Missed an 80% chance to hit - that's such an offmessage shot"

"Oh, NOW I get a critical! Thanks Offmessage!"