Anyone have a suggestion for a counter pick against Jack?
Jack is very weak against pressure, he can't properly sidestep like other characters because of his size and he has no 10 frame jab or evasive moves. Rush down characters like Law and Nina work really well against Jack imo. Dragunov also works well because he can easily close the gap with WR2 and pressure Jack constantly.
It doesn't really matter who you play though. Just try to stay at range zero and try to pressure him a lot. Try side stepping and side walking to the left as well as it beats almost all of Jack's options except d/f+2.