There is some negativity going around on Steemit because of the whale wars. Wars like this maybe are needed to push Steemit to a higher level.
You also will find more negativity because tou are reading more and more posts, not only within the tags where tou did start, we are all enbroaden our interests!
Also maybe because the crush is over and it becomes love. Just like in a relation we are blind for the negative things during the crush phase, which evolves when we enter a more serious relationship!
I do think most if the inactive account are from people who thought that Steemit is a quick rich scheme, we all know that hard work is required so make a little buck. So I’m not worrying about these numbers!