Not my bad luck and not G40, but at a Revised Tournament I once took 9 INF/ART/2 TANK to strafe a German stack of 4 INF/7 TANK (I just wanted to kill 3-4 INF and retreat to West Russia to link up with my reinforcements, to deter the Germans for another turn and buy time).
I ended up winning the battle and only losing 4 INF because my opponent’s rolls were simply atrocious. Opponent conceded the game soon afterwards because that battle completely turned the tide of the game.
Later in that same tournament I got diced in the R1 Ukraine attack (4 INF/ART/2 TANK/2 FTR Vs. 3 INF/ART/TANK/FTR), lost everything but a tank and the planes and only killed the INF (one round of combat. Yes, every German die hit.). Not a good way to be sent packing.