Poor bedside manner is really disheartening when dealing with something as tenuous as "will this frame be ok and will my money have been wasted?" I'm sorry that happened. The frame has had its share of bumps and bruises, as we have seen from your very thorough going-through. [MENTION=381793]gugie[/MENTION] had his Raleigh Grander Sportier ripple its head tube pretty good as he was easing the headset cups into the frame just after powdercoating. It just completed a three day, 170-mile tour with no issue.
If you liked the way it rode and handled before, I think it's worth saving and riding again. I'd fix the brake bridge and go from there. Ultimately, those with more knowledge and experience will chime in.