I have summarized the statistics on the rolls in Motif Backgammon Statistics . Out of the tens of thousands of people who play Motif, there are sure to be a few who have extremely bad luck. These people have every right to be suspicious. It common to see runs of both good and bad luck even with random rolls. Given the selective nature of human memory, people tend to remember their bad luck much move vividly than their good luck.
Computer programs have a different playing style than human players.
Motif generally handles itself very well in positions where a lot can happen in the next roll. It does a good job of assessing immediate risks and positioning its checkers to take the best advantage. While it is true Motif sometimes makes obvious errors in other types of positions, it still plays a pretty strong overall game. If you are used to playing only human opponents, you may not realize that some of what appears to be luck on Motif's part is really the result of careful calculation. All that being said, if you still think you've been the victim of bad dice, feel free to write and tell me about it.