Robin did explain how it hurt, but over time that should have softened, especially with Barney falling out of touch with the gang a little. Of course, the kids are familiar enough with "Aunt Robin" that they have been around her on numerous occasion, yet Ted somehow mourned the loss of her presence - it was thin. If she holds a grudge for decades, she is an unhealthy wreck anyway.
The fan edit is very solid, I was surprised at how a little tweak could really make the same content work. Unfortunately, 20th Century Fox has taken it down from YouTube and Vimeo, so it's going to be difficult to find, but it's around 6 to 8 minutes, and it starts with Ted at the bar instead of in Chicago scene, has Lily telling Marshall she thinks this time is different for Ted and immediately cuts to shortened scenes from Ted and Tracy's future such as the halloween party with them together so it suggests Ted has found the one and I think removes the Robin suffering from that scene, and uses Future Ted's narration without the getting sick (it's still got a little finality in it because of the way it was written, but is left more vague) and then cuts back to Ted and Tracy meeting on the platform, then "and that's how I met your mother" along with the end title card and credits. It's much, much more hopeful and open-ended, and leaves out the Robin bit entirely, leaves out the Barney backslide, and just focuses on what's important. IMO, that edit also makes Ted feel like he's finally grown into a man at the end.