Nothing wrong with constructive criticism but if you can't do that without insult, chances are that the reasons behind that criticism are not well founded, or at a minimum, not well formulated. I do see some problems with vote bots though, because if they are misused, they will turn the platform into a colony of cheerleaders and disingenuous yes men by those that come in with a lot of money. This exacerbates the issue of folks fishing/begging for upvotes, something I just ran out of after a long battle. I was getting bored with some of the "niceness" anyway and now know exactly where I stand with whom. Maybe I'll write a blog post about the experience to contribute to the general Steem school concept. Have a good one!