for me it's vex mythoclast. I tried so hard to get it and now I have its very underwhelming, decent but just not a gun I will use often. edit- a lot of hate for the last word so far! edit- loving reading the responses! Thanks guys. trying to respond to you all. edit- over a thousand responses! wow! have still been trying to reply to you all the best I can. It seems the most hated gun exotic wise is; 1.the last word 2. suros regime 3. invective/red death it seems thorn should get a mention as a top 4 weapon!