I don't want to beat a dead horse, but you did mention setting up a discussion about this, and now you don't want to discuss other things than support requests.
People are not angry because of your app, issues, bugs, missing features etc. They are angry because you left them hanging, without knowing if you EVER would come back. Each day you were gone + each day you didn't reply, they didn't know if you would be back ever, so they begin fearing that their business model is dying.
What did you expect people to do? You say it yourself, that you have been active for so long, and supportive for so long and then you suddenly aren't. It's very likely that something has happened.
Yes most support requests might be people not knowing how to use it, or asking for things it can't but i expect that this must a large part of your support routine anyway, and is equally important for people to be told that it can't do this and that, as fixing bugs.