It seems that Garth Brooks stopped touring 10 years ago or so because he got sick of it. That's fine, that's his right.
But that was what he was best at. It's what people most liked about him as an entertainer.
With this show, it seems he wanted to be a different kind of entertainer. Like a comedian maybe, or a motivational speaker. And if people like that, so be it. But I don't think it's what he's best at.
Look at it this way: if the guy on stage wasn't Garth Brooks, but a nobody with a guitar who wanted to sincerely and enthusiastically talk about all the cool artists he and his parents enjoyed, would you really find that show compelling? Me neither.