I'm still mad, and my daughter is, too. But she doesn't dwell on the past, because she's too busy moving forward. I learned not to count only on doctors, but to do my own research.
She had constipation, too, possibly why she went undiagnosed for two years. One of the top 5 pediatric gastroenterologists in the States who specializes in Crohn's just looked at her and said, "I see a healthy kid!" He told her to eat more fiber and talked about her psychologically, saying she was an A student, so was under stress. He didn't bother to do a blood test, much less a colonoscopy. A year later, she landed in the hospital with a stricture. He had written a book about Crohn's in the mid-90s, so this is somebody who should have known better. Quite frankly, he just didn't seem to care. He never apologized, which made it worse.
What's worse, is medical schools to this day, including Mt Sinai, are not doing a good job of communicating that not all Crohn's patients have D. Perhaps the IBD medical curriculum should require all doctors to read at least one year's posts on HW 
On the other hand, my daughter was relieved to get a correct diagnosis (from somebody else), because that was the first time that she had proof that the symptoms were not "all in my head." And with meds, the stricture has gone away.
I got a chuckle out of reading "kind of mad." Be as mad as you want. You are entitled. It wasn't fair. You were shafted. You can get even by getting better. And you can always vent on HW.