In a nutshell, I listed five champs (one for each respective role) as the main "bad luck" champs.
These champs seemingly cause me to lose whenever they are in my game (or at the very least, they just decrease my odds of winning). When these characters are on my team, the players generally underperform. Conversely, the enemy team playing these champs just go ham on my team in a lot of cases.
What are your "bad luck" champs for each respective role?