I think we can safely say, at this point, that anything other than the version of Doctor Who you have in your head is NOT going to result in a positive post.
You mean the Doctor Who that existed from 1963 until 2017 (with a few breaks, obviously)? The actual show? The one with the alien who traveled around saving time by doing things, and not just spending 45 minutes every week shitting out self righteous speeches about how doing literally nothing makes said alien the bestest person ever (I mean, the Doctor did that a few times over the years, but not every damn adventure for a whole series)? Yeah, anything not related to the actual show that was called Doctor Who will probably not be a positive post. Start a private reddit or facebook group or something if you only want people who parrot your opinions to post about a subject.
Anyone who just wants "positive posts" doesn't understand what a discussion is, or what a public forum is for that matter.