There are lots of forms of this, in writing there’s the ancestral sword that happens to be sharper and stronger than normal metal. My absolute least favorite is the plot convenient personality traits. The character who has an issue with authority so big they pick fights with anyone who tries to direct them. Most of these will get stamped out in the editing process.
Recently I ran into some in fiction that made me wonder how the hell they made it past a sounding board. In a situation where the enemy is attracted by loud noises, one of the key characters hops on to a loud motorcycle to make their escape from an area laden with the enemy. The other major issue in this one was people backing into a room in the building that is being swept for enemy.
Why gods why? These are people who survived an extended period of time in a hostile landscape. Somehow these two mistakes don’t get stepped on by anyone. All survivors? Can someone explain this one to me? What is the worst bit of lazy creator syndrome you’ve seen lately?