It has nothing to do with superiority, it's all about the proper classification and purpose of the art form. Aikido simply isn't a combat art. A self-preservation/improvement art, perhaps, but a combat art? Not even close. Certainly there's some spill over, but saying that Aikido is something akin to Judo, Bjj, Muay Thai, Boxing, etc. is simply a mis-classification. Once Aikido is classified correctly, all the malice towards it will be avoided.
As for Ki, hey, whatever you want to believe in. I once believed in Santa Claus and the Tooth Fairy, so it's all good.