The amount of anti-plant threads didn't bother them. The amount of anti dynamic queue threads didn't bother them.
It's something called negativity bias, and here's how it works. On a forum, especially a forum like Gameplay, people only feel the need to start discussions if they have something to say, and if they think that something will start a conversation.
There is very little reason to start a thread saying "hey I love the game!" But when those threads do get started (Thank you Supports, Can we acknowledge they killed tank Ekko, etc) those threads get many upvotes as well.
The negativity in the community gets more visibility because you have no incentive to show appreciation for what you like. Your incentive for showing disapproval is that maybe it will affect some kind of change. Because of this, the motivations for expressing positive and negative emotions on a forum are completely imbalanced and you would naturally expect to see significantly more negative threads than positive ines (which we do. All the time. For years)