I think you just have a case of the chatties lol. I do think the initial response you received was a bit harsh, but you didn't give a lot of thought to any part of your post. I'm not mad, obviously, but a little constructive criticism goes a long way, and I don't think you were actually helped properly there.
Firstly, that post is definitely not related to Dump Mii Nand in almost any way at all. In forums like this, you should post your question in the most appropriate thread. If it's a general vWii issue, for instance, my guide would be a good place to post a question. By posting in the Dump Mii Nand thread, you set an expectation for anyone who is going to read your post that it will have something to do with where you posted. When users went through your post and found it had nothing to do with that program, they were understandably confused and a little angry that their time was wasted.
Secondly, if you are unsure of where to post, you can always start a new thread. Asking n00b questions in a brand new thread will be met with criticism, but not as much as what you received.
Lastly, you need to only give as much information as is necessary. If your problem has to do with Wii U, don't launch into an epilogue about how you set up your vWii. If it is relevant, users will ask for the information. It is important to give good info, but it should be pertinent to the problem at hand.