Part of being successful growing hydroponically is learning from your mistakes. But you cant learn from them if you don't know what they are. Transplanting plants isn't a problem if you know what the potential problems are and how to avoid them. You can even cut off roots intentionally, but knowing how much is OK, and knowing what to expect when you do is the important part. Your problem may have even very well been mostly related to your
hydroponic system design in the first place rather than the transplant itself. Even if a significant amount of the roots were damaged, knowing how that will affect the plant and why, as well as how to compensate for it to reduce stress on the plant would have been valuable knowledge for you in the future. But since you refused to let me help you, you still don't have any understanding of what went wrong, and/or what you were looking at. Good luck.