At least Poland will have Polish-made choppers, so he did at least one thing right.
Perhaps that's why he's quit, as he realises that the whole deal stinks and that Poland has gone from a tender whereby Poland would obtain 50 heavy-lift helicopters (badly needed) to...nothing. A man like him (who isn't an aviation expert, BTW) perhaps realises that if Macierewicz falls, he would probably fall along with him.
Still, if you think Poland losing out on vital heavy lift capacity and replacing it with nothing is a "thing done right", well...