Here are rules I made myself for blacklisting this year to be specific for you and why would you end in my blacklist if you would be winner.

Won twice as much as gave away. Here was one exception, if the winner has less then 10 wins, played most of them and gave away few titles aswell. This was main rule because of blacklisting lot of winners itself and I shouldn´t care about other rules.
0 giveaways and won more than 3 games.
Rule breaking.
Won more then gave away and didn´t play most of them.