I'm assuming that you're referring to the "Mann One" comment. Ignore it. Comments like that, which do little more than present harsh criticism without explanation, are not worth getting upset about. Especially when the critic is cowardly enough to post it anonymously (and thus no dialog is possible).

I think that a lot of readers out there truly fail to grasp the level of effort required to truly present an engaging, well-written epic, and are too quick to criticize anything that doesn't perfectly match their perception of The Ways Things Should Be. That doesn't mean that we're perfect, and that constructive criticism is never warranted. However, my view on that is that such comments should be private and offer suggestions for improvement, rather than just blasting away with hurtful comments.

Your story is a gift that a certain anonymous critic is unworthy of. Don't let it bother you.