Sorry to hear that you're having trouble in the community.
Hopefully, I will be able to provide some assistance and I will definitely make a note of your comments for future community updates.
I have a few questions that will help me provide a better answer...
1. Single conversation threads - these are the threads that may contain 100 comments Would it be possible for you to provide more detail on this issue?
2. There is no way to mark a response as a proven answer that I can see; Is there any way to enable this? (Perhaps in tags, by comment?) Are you referring to marking a reply as an accepted solution/best answer?
i.e. Search for a thread about Harvest, Graphite, and Grafana. There is one one thread consisting of maybe over a hundred messages. I can COMMENT, but I cannot REPLY. I also cannot mark a specific message or post as a solution.
On the issue of single comments seeming like threads - on the main page, each topic is shown only once, but if you click on "Show all" it shows each comment as an item in the list, instead of just showing threads..
Yes, I understand. However, it seems that more and more requests for help are placed under a single article. What you end up with are message/comment trails some with tons of linear comments. What is worse, is that NetApp article authors encourage this linearization. It just makes it difficult to find answers, and seeing that others are following this kind of comment trail makes it less likely for a participant to enter a new message.