I don't think anyone here is qualified to say exactly what Alex's life was like. The amount of time spent on him with his training and his interaction with Dr. Irene Pepperburg and her staff that cared for him. But one thing we do know, is this, he was very much loved and admired by them and the entire Grey World.
Yes, I have read many articles and seen many videos about Alex. Some do say he was trained for about 8 hours per day. I do think that is extreme. I have a hard time believing that was accurate. That kind of training does take a toll on them, and they really, like a child, don't have the attention span for it.
In his most recent video with Alan Alda, and Dr. Pepperburg, he to me, did look very tired and weary. But that could just be his look, and the time of day. Many factors to consider in his busy life.
We all have different opinions, but that's ALL they are, opinions, not facts.