it supposedly was shrapnel munition, so you want to hit closeby but not necessarily on the target. But the bomb went through the hole and exploded in the canal under the street which is what saved his life. I see no reason to give an IOF stormtrooper the benefit of the doubt. They wanted to kill him, but accidentaly bungled it simple as.

It's in the exact same spot as a previous strike. It's called a "double tap" attack, and it's a war crime.
The guy only survived because the bomb went off inside the crater from a previous strike, he would've been turned into powder if that had exploded in the surface.

If you mean missing an ant with a gun, then maybe. But it doesn't look deliberate, and the explosion could have killed them anyway