Thanks for the explanation. I am aware of that; however, the sentence I quoted does not make sense grammatically; "algorithmic complexity" is not an adjective.
I did consider adding a final paragraph saying something like "I am assuming here that you were sincerely asking a question rather than merely being rude and snarky, but of course that may not be true", but decided to play it straight.
So, having established that you were merely complaining about a grammatical slip, and that despite asking "what does ... even mean?" you knew perfectly well what it meant:
Yeah, I agree, it would have been more correct had they written something like "provided that your problems are not a matter of algorithmic complexity" or "provided that your problem is not algorithmic complexity". Congratulations, you found a mistake. (Though not, I think, anything to do with thinking "algorithmic complexity" an adjective.) But (1) so what? and (2) if I'm right in detecting a subtext of "man, if they can make that mistake, why should I take anything else they say seriously?", then I strongly disagree; anyone can perpetrate the occasional grammatical error. (Just out of curiosity, I looked at some of your recent comments, and found one having looked through considerably less text than the length of the article in which you found an error. I dare say one could do the same for mine. To err is human.)
