"This service sucks, I hope your company goes bankrupt" vs "This sucks, I tried to upload a pdf to the dooberywhatsit file storage service and it error out because the file had DRM on it and it couldn't read it. It should just store it as a standard file instead of rejecting it as an invalid PDF"
Example made up, I don't even know if pdfs have DRM aspects.
Generally the line is around the "Can I use this information to fix the problem (even if I don't want to)" mark.
Criticism = constructive criticism
"This service sucks, I hope your company goes bankrupt" vs "This sucks, I tried to upload a pdf to the dooberywhatsit file storage service and it error out because the file had DRM on it and it couldn't read it. It should just store it as a standard file instead of rejecting it as an invalid PDF"
Example made up, I don't even know if pdfs have DRM aspects.
Generally the line is around the "Can I use this information to fix the problem (even if I don't want to)" mark.