I can't speak for coach but I am not trolling you--nor have I ever. I don't have any problem believing in your card counting and the results that you have disclosed. Seems very believable to me. Maybe the problem is just that in espousing the Law of Large Numbers, you have over stated the benefit of the $8,000 loss.
Tableplay has clearly explained and I am in agreement with everything else he has stated. But you have to overcome the loss and that means that you have to out perform the 51.5% for whatever time that takes based upon the size of your bets. I don't know the estimated time that will take and there is no guaranty.
So while I understand there will be winning and losing sessions, I don't ever classify a losing session as a great day. Simple as that.