Brag: I am not a shitty player. My 2/5 win rate is consistently significantly above the 10BB/hr "great" player standard
Beat: I think my win rate becomes -$500/hr when a LAG who plays way too many hands sits down because it fucks with my game flow and my potential to play hands against the fish
By LAG, I mean someone ridiculously off the charts loose to the point in which it's even hard to construct a 3bet or fold range because the guy raises over 50% of hands. But he's also suspicious and floaty and it's unknown how much you have to bluff off if you don't have a monster. If it's someone slightly looser but still plays fairly reasonable hands, say a 30% then he still substantially changes the game negatively but doesn't set off tilt.