There is very little in common with what Modern Aikido does today and what Morihei Ueshiba did. And yes, there is a right and wrong when it comes to Ueshiba's aiki. And no, I don't believe Ueshiba would agree with you. Why do you think he stormed into the dojo and yelled at everyone that they weren't doing his aikido? That he said he looked back and no one was following him? That Saito was learning Daito ryu jujutsu techniques in Iwama while Tokyo under Kisshomaru's direction was doing something entirely different?
You clearly know more about O'Sensei than I. If what you say is accurate, and I don't doubt that it is, then O'Sensei was just expressing a normal instructors frustration at his students either not listening, or doing their own thing. I can fully understand this. I've done that enough over the years.
However it is human nature to develop and change something to our own way of liking. I would like to think that most wise old men would understand this. If O'Sensei couldn't, and demanded that things be done his way forever then he lacked understanding of this part of human nature.