I think those people (or those they fought with) have more problems either with themselves or those friendships than they're aware of if Savage is enough to tear them apart, but I'm aware this is an MMO we're talking about here.
Like I said, there's certainly good advice from a practical perspective, and input from experienced raiders can be invaluable. But recalling my early experiences, and having also been in OP's position as a leader of a group of first-timers on a few occasions who were incredibly reluctant to try because they didn't believe they were inherently good enough and were wary of encountering similarly cut-throat attitudes, I think it's important to remember the human element here and that when you are raiding you are dealing with people, not a composite of numbers on a screen. The sad thing is they were actually really interested in Savage, but saw it as the domain of some hardcore, super-player collective and were convinced they had no place there due to the sense of gatekeeping surrounding it with obsessions over logs and achievements and the like. And again, some people do play it and get a sense of satisfaction from that perspective, and that's fine - but that's not what it's all about, and certainly not for everybody who plays. I just wanted to reinforce that, for those who perhaps weren't aware.
I'm glad you've been able to find some useful information, and that you can take what you personally need from it and apply it to your own situation as needs be. I know other people in your position can find it a bit daunting and wanted to add in such approaches to Savage are not universal, and it's more accessible than people sometimes realise and more than capable of being a source of fun challenges for groups to enjoy, since that can often be forgotten about amidst all the hubbub about rotations and numbers. I hope it works out for you.