The art of criticizing

It just means, that you should first read what you are criticising.
Then you should understand what it is about.
Then you should find something you disagree or consider wrong.
Then you should write clearly what was wrong and what you disagree with.
And finally, you shall bring argument to prove your point, if it wasn’t obvious yet.

To show how to do that wrong, I’ll cite one of your own replies, that you yourself got famous for in this IGS (cited here as

I believe Diana is asking that you transmit more of these messages to her personally. One a day should be perfect.

)
I think you can understand now, that I’ll say I am not really interested in arguing or discussing anything with you any further.

The only thing I’ve left to add, is that I think, that if you are so good in spotting translation software mistakes, you should leave IGS and join instead quality assurance team for the translators, because by doing that you’ll make both IGS and translators better.