If you want to discuss Moderator actions (such as thread/comment removals), you'll want to create a thread in Discuss the Boards, which is a subforum dedicated to Moderator action as well as guidance in using the Boards.
Player Behavior is more intended for discussing the player behavior systems (IFS, LeaverBuster, Honor) and individual player behavior.
As an aside;
...without a bunch of moderators spamming down vote...
To my knowledge, most of the Moderators tend to err on withholding downvotes out of respect to discussion. I haven't seen any outstanding cases to the contrary, so I'd reckon if you're getting downvoted a lot, it's by other players who just disagree with you for one reason or another, not Moderators.
This is the place where you want people to ask for game play changes and yet it is highly restricted on what people can actually post.
If you're talking about the Gameplay subforum, the biggest restrictions there to my knowledge are that you have to remain respectful and you have to actually present a discussable argument; you can't just call for "nerf x" or the like.
There are of course more general guidelines to follow, but, as someone who never really looks at Gameplay, those are the two biggest rules I know apply.