Why is Hexakill being seen so much over other game modes?

I personally think that the way Riot is spreading out these gamemodes as to when they are played is simply terrible. There are weeks where the same game mode will be put out twice in a row (Hexakill) while other game modes that are so much more creative and fun to play compared to 2 more people on a bad map. For example, Urf and One For All. We have seen both game modes here once while Hexakill is on its third time starting today, and a very new game modes has already been put out more than older ones. I understand that some may like Hexakill and other game modes that have been put in multiple times, but I personally don't think that Riot should be putting the same game mode 3 times before a seperate game mode has even had a chance to get into the game twice in a year. Seeing the overused game modes on League of Legends over and over is simply disappointing at this point, and it would be nice to see some change.