No one cares much how anyone kill ants, cockroaches, rats, mice, spiders. So you you consider coyotes pest like these no such thing a bad shot. Any shot that hits is one less coyote. I cannot pass any judgement on another persons shot placement. Those that like in glass houses shouldn't throw stones. Mistakes happen, no one is 100%. I'm getting better at coons. They move much less than coyotes so are a much easier shot. Even then I think my batting average is about .900 not 100%. I had a coyote in my backyard 2 times now. I passed on trying to take it out because it wasn't causing me any problems and having only a .25 I would have to go for a low percentage head shot. I would hate for it to die in a neighbors backyard and make the local news!
If I had a 200 FPE .357 with hollow point slugs then I would feel better that an easier double lung shot would terminate it inside of my property lines.