While they certainly did use Mangos, it is worth pointing out for the less informed that they did a lot more than "a few bugfixes". If you compare the current Elysium core (taken from Nostalrius and opensourced) and the stock MaNGOS that existed at the time of Nostalrius launch there's absolutely no comparison- let alone if you compared 2005 MaNGOS as released by marenkay and what we have today after over 10 years of open source development from thousands of contributors.

All of that said, myself and millions of others who have enjoyed classic servers over the years have you to thank for laying the foundation,and I agree with the other (downvoted) poster who says it saddens him a bit to see you regret something which has brought so much happiness to the world. If you ignore the selfish server administrators and look at the comments from some of the better parts of the community you'll quickly see that you've helped a lot of people cope with various ills in their lives, and many people have outright told me that they felt classic servers had helped them stave off depression or even suicide.