I think all "op" guns are a result of Internet groupthink for the lack of a better word. With this new gen of consoles, everyone is able to upload and stream gameplay so as a result, the popular streamers are influencing a large amount of players to adopt their style, which in turn influences the rest of the community by killing them with the same thing over and over again so they adopt it too because if they get killed by the same thing over and over again it must be good (or so they think). So really it comes down to streamers and youtubers and the people who watch them (who are these people?) who think they will be better by using what the see better players use. This has always been true for most games but the effect took longer to form since there was never this instantaneous connection to the entire community. What I mean is that the second something is discovered, like a glitch or good gun, it is adopted by the rest of the community literally overnight. Cheeses are a good example as well as the loot cave. Once these are found, it's pretty much instantly adopted by the community. This is all due to the ease of uploading and streaming.