If you don't want feedback and constructive criticism maybe don't ask questions.
We're here to help. We are trying to address any and all issues that may be part of the answer to your question.
If you're underfeeding one, that may lead us to believe the others are underfed as well. As for the mite issue, it's something that can occur and re-occur if not treated properly. People are offering help. Being argumentative and condescending isn't a good way to get help. Maybe be appreciative that people took the time to try to help...