May have been a vocal minority. You get some people incorrectly complaining about AI cheating in any game that utilizes randomness (Civilization and the new XCOMs are two examples I know of); usually this leads to somebody running a series of tests or decompiling the source code to show people that no, the die rolls are actually fair or (as is commonly the case) actually actively biased in the human player's favor.

This never stops some people from complaining nonetheless, but a lot of others find the evidence convincing enough and just chalk it up to their own biases (and are less likely to suspect cheating when they play the next game that has random elements).