In the video he didn't seem angry. More regretful of losing control of something he loved but knowing he was too old (70) to count on making 3 more movies. He could have made a comparison to marrying off the films instead of selling them into white slavery and made the same point without having to try to pull his foot out of his mouth.
Lucas could have given the reigns to JJ Abrams or even say his friend Spielburg who expressed at one time to wanting to do a Star Wars picture without selling out to Disney. I don’t think he could have kept from meddling though. Once Disney took control they tossed his outline for a story and did their own thing with no meddling from George.