Yes these machines are a complete cheat. I play Blackjack and can see the cheating patterns. Dealer nearly always get's a 10 for his face up card, whilst I'm left with poor cards totaling 4, 5, 6, 12, 13, etc.
When I do get 20, so the dealer...or 21 or Blackjack. You rarely get Blackjack yourself, usually an Ace followed by a low card. When you want a small card, you always get 10...when you want a 10, you always get a small card.
I'm done with these things...but some of them certainly need investigating. It's too often to be just bad luck.