Sadly (or actually, maybe for the best) the older we get, the more we're able to see that our "idols" are not perfect, and have faults, just like the rest of us. Frankly, if you peer into the minds and reasonings of any creative type, you're going to find things you might not like or approve of, or disappoint you. The question is, can you separate those feelings from your feelings for the art they've created? In other words, can you "dislike" the artists, but still love the art they made? it's different for everyone. For me, while I might not agree with everything my favorite actor or director or singer, whatever, does in their personal life, it doesn't, for the most part, affect my love for the performance itself. Once released into the world, it has a life separate, some might say bigger, than the artist him/herself. I now pretty much detest Mel Gibson, but I still love his work in "Year of Living Dangerously." I in no way approve of Elia Kazazn's participation in the naming names during the Hollywood Blacklist era, but that doesn't mean I don't think "On the Waterfront" is a masterpiece.
So when you say the doc has tainted your view or the band and their music--don't your personal memories regarding a song trump notions stirred up by the doc? Cling to where you were and why you loved it when you heard "Lying Eyes" or "Take it Easy" or "Hotel California," and how the song made/makes you feel personally. The guys always intended the songs to be bigger than them and whatever personnel made up the band at that time. The music speaks for itself, and how it speaks to you, more importantly than anything else. Band politics or politics of any kind shouldn't interfere with your enjoyment of the music. If it does, I'd advise to take a step back, and let your associations with the doc cool down. Hopefully you'll be able to listen to an album in a month or so and rediscover what made you love them in the first place, before you knew what was "behind the curtain," so to speak. You don't have to approve of all their choices and statements by liking their songs again. Apprecisting their craft dorsn't mean you blanket-accept them at their best and worst. It just means you appreciate how the creative alchemy of those men made some damn good music.
As for the "Glenn was a bully" generalization--could he have handled things better over the years? Sure. Did all of his comments and actions in the doc thrill me? No. But I have no idea what it is like to lead a super-selling band, so who am I to question him? (And I'm sure much more went on behind the scenes than we know, thst went past just Glenn. He's the "press secretary," so to speak, that is the public face of these decisions, but I think Irving and Don play a much larger role than the doc let on.)
It's an accomplishment to have a band last for over 40 years, and I think that was always his and Don's goal--to have the band---No, the band's music--endure past all the fads and ups and downs of music, and the ups and downs of personalities. For them to accomplish that legacy, they felt they had to add or lose members as time went on. One of them said once, the band outgrew certain members, and in think, in their logic, that was true. It's sad and it sucks and maybe the way they went about it wasn't as gracious as it could have been, but the music has always survived, and I think that's what Glenn always wanted. Band business and politics ain't pretty, but a band isn't some magical utopia with no conflict. Nothing in this world is a utopia with no conflict. They did they best they could, and everyone know seems the happier (or at least content) with the changes. Even Don Felder, while he might wish he was in the band again, must appreciate the creative freedom of being on his own now.
In comparison to the ups and downs and dramas of other rock groups, I think the Eagles are typical or even rather mild. It's a success that they've lasted 40 years, and the members have all survived past their excesses into family men in their 60s. if they hadn't made those tough decisions and separations at various times, who knows what the status of the men and the music would be now?
Lord, sorry, this was really long!!