Quote from idSurge »The MTGO shuffle is no way random. If you have an all lander, and you mull, you are nearly certain to be screwed with 1 landers at best for the mull to 6 and 5.
Perfect example of how anedoctical negative experience affects humans opinion and emotion.
We can at least assume it is more random than human shuffling: https://www.mtgsalvation.com/forums/the-game/other-formats/599395-the-mtgo-shuffler-isnt-rigged-and-thats-the (for reference)
Also, i didnt intended to discuss about shuffling and randomization