I played multiple rounds of Standard best of 3 today. A disproprortionate amount were non-games due to the shuffler dealing me consecutive 1-land hands in a deck of 25 lands out of 60. One game, I muliganed 3 times to get a 1 land hand each time. A previous match the same day I had 2 muligans of 1 land before I had a 2 land hand on the 3rd try. You can lie to yourself all you want and say it is "random" or confimation bias, but that does not excuse lazy programming.