Alright, cool, but suggest something better, then?
The way this time period is taught in Swedish schools is that we talk about the "viking age", and people generally know that referring to everyone living in Scandinavia at this time as "vikings" is wrong and sloppy, and a better term is "northmen".
But you know what? It doesn't matter.
The fact is that this time period (~800 to ~1050) in Scandinavia is reasonably well-defined, and characterized by a bunch of distinct shared features; art, religion, language, and culture, such that no other cultures had these features at this time. The start of the time period is usually set at the raid on Lindisfarne, because this was the first time that Scandinavians had some sort of effect on the rest of Europe, it's the first time we got "noticed" by the others, it's the first time we appear in history.
The Viking age generally ended with the Christianization of Scandinavia, and the establishment of the nation states that pretty much powered the historical events of the last thousand years in the area. Sure, history is always a continuous blur rather than well defined eras, but it's still a useful concept. The age of dragon-headed longboats, human sacrifices to Odin, runestones, and the Varingian guard was a thing, it was unique and unparallelled, and it left behind a legacy outside Scandinavia in the form of for example Normandy, the Danelaw, or the Kievan Rus, and a legacy inside Scandinavia, being an intrinsic part of the "founding mythos" of our modern nations.
This thing needs to be called something, so why not name it for the thing that started it, why not name it for the people going viking?