The attitude wasn't necessary.

Cloudy is an incredibly diverse and talented builder. What you seem to underestimate is the sheer scale of the project. As he has said, Neoclassical architecture relies heavily on symmetry and scale. Would you honestly expect him 1. To build it by hand? and 2. To deviates so far from initial and accurate plans to build a palace that is true in aesthetics and proportions to real life. If you have any criticism (which judging by your account, you shouldn't really) it'd be much more beneficial to articulate it in a constructive and cooperative manner. Great job, Goo - don't mind this guy.

I see how you may not agree with the use of Copying and Pasting certain areas of builds, however this comment could have been presented with a better attitude surely.

Perhaps next time try to focus on the wording, such as point out that you dislike the use of it, and how the person could improve upon themself to do better and perhaps not use it so much.