For Me It Would Have To Be "Black_Hand"-Demoman on the Dustbowl Server, I Don't Get Why But He If Your A Spy He Always Knows Where Your Headed if Running Away, if Your Turning A Corner, He Already Has A Crit Pipe Bomb Headed At Your Face Once You Turn The Corner, If Your A Pyro In His Face, He Just Crits You With The Beer Bottle, If Heavy He Blows you Up With Stickies Before You Take out Even 1/8 His Health, oh And If Your Ubered, Your Sent Flying Accross The Sky
This Dude Dominates Me Atleast Once Every Single Round, If I'm Lucky Theres A Huge Mob of Team Mates There To Lower His HP, Then Maybe Just Maybe If He Doesn't Kill Us All Instantly, I Manage To Do Enough Damage That When Another Team Mate Comes Up Behind Him and Kills Him I Get My Revenge
He Annoys Me Soooooo Much..... But I Deal With It,
~Sigh~ Sorry For My Long Rant