I've seen a lot of QQ'ing on the zonechat about this mission so there's a few pointers people should realise before getting so worked up.1)
There are several people out there who've made maps to show you where artifacts can be found such as this:https://www.reddit.com/r/sto/comments/4ng5hk/qwens_artifact_hunt_map_and_artifact_locations/
Whilst not perfect (you still need to use the scanner to go in the right direction), at least with the map you can get a rough idea to narrow down your trajectory.
When scanning, try not to do it too far off the ground in a floater, it's a very brief image on the ground and being high sometimes means it won't even show up.
Also, on sloping ground it gets a bit wonky and might not always render properly.
When you do scan for the artifact, i often will do a first scan, then walk a few paces and scan again. This give you two bearings and around the midpoint of both combined will give you a pretty good direction to head in. Combined with the aforementioned maps this makes it a lot easier to find things.
Lastly, if you find it a real pain to complete in the allotted time, remember you can pick up the mission at any time and do it at your own pace, then just turn it in only when the event is up on the schedule for bonus marks. That saves you racing against the clock if you find it tricky.