The impression I always got was that Ed was a nice guy, but Ed and Al together made for one giant asshole. I don't know about Al by himself because you never see him alone, but the two personalities, perhaps combined with drink, was toxic. Not being able to get along with DLR I can understand. Titty-dancers are notoriously hard to get along with, and that's exactly who DLR was. Sammy would be easier to get along with, but he's proud and opinionated, so maybe that can go sideways, as well. Not being able to get along with Michael Fucking Anthony? The most chill guy on Earth? Isn't he still married to his highschool sweetheart? That baffles me. And from what I've seen MA was treated worst of all. Ed belittled him, his playing, his singing, and his contribution to their music. Now you've got three completely different personality types and you can't get along with any of them. At some point you have to look at the flaming wreckage of friendships past and think that maybe you're the problem.
He was able to work, barely, with Dave. That was a business thing. Separate trailers. Separate hotels. Most likely separate flights. Play for two hours and disappear for the next 46. I'm glad he was able to make amends with Sammy. They probably had the most in common and were the most likely to be friends IRL, outside of their business arrangement. There was something different going on with MA, though, and I have no idea what it was. Based on what I've read of the last twenty years, and the demise of the tour a year ago, it sure seems unlikely that they had any contact. There seemed to be a real resentment there, for some reason, and damned if I know what it was.