I'm truly sorry to hear that. I actually did 100% of all phone screens with engineers for the first seven years of Scribd.
That had good aspects in that I was able to talk to every single person who was interested in working with us, but it also had bad aspects where towards the end there were days when I let my schedule get too crowded and I ended up having to attempt to do phone screens and other things at the same time.
While I certainly wasn't trying to be rude, I can see how it could come off that way. After a while, I corrected for it and we trained a set of other people who helped with interviews, and it no longer happened. But clearly the damage was done, and really there's no excuse for coming across as rude to anyone, ever.
Sam has a quote about this: "Don’t screw people and don’t burn bridges. Pick your battles carefully."
Sam is right. The industry we work in is very small and people have long memories. It's incredibly important to treat every single person you meet with the utmost respect. I'm not sure who you are since you posted anonymously, but I'd love to make amends over a beer if you're up for it.