We can't honestly be surprised there are Rioters that think this place is a shithole.
Most of the posts in Gameplay are vitriolic salt posts indistinguishable from shitposts and if not the posts themselves then the comments on them often will be. Gameplay+ just got shutdown because it saw so little use because people mostly come here to bitch and moan about Yasuo, Lee Sin, Vayne, or whatever else is popular to complain about. Actual discussion is often drowned out by people who have no interest in actually discussing balance and often when a Rioter comments anywhere they're inundated with replies from those same salty whiners.
Is there proper, good discussion going on here? Yeah of course, but like Riot August said himself there's just better places to find actually good, proper feedback. Places where you don't have to wade through a river of shit to get to it.