Most folks don't really care what you are doing. Because they don't understand your issues at all. Just say "It was the solution to a problem we were facing. If you want to find another solution, be my guest" and watch their 'anger' disappear quickly.
That’s not that terrible of advice. You are empowering others to take action rather than feel disaffected. If they can come up with a better way with the same constraints then why not? Otherwise everyone gets to move on.
