Who else believe's Riot doesn't listen?

I wrote a board not to long ago about how Riot should make tutorials for each role in the game but I wondered why it didn't get a response from Riot despite it being at the top of the boards and it asked/requested Riot to acknowledge the board and implement the idea to League. If a player has a good idea (not saying mine was) for the game will Riot not even consider it because they didn't think of it 1st or something? I'm not sure if what I'm saying is 100% and I maybe speaking to definitely but I just want to know how does Riot take in the ideas of the player base? Dozens of designs of champions are sent to the boards everyday but Riot doesn't acknowledge many of them; is there a reason for this or is it that Riot just doesn't check them out or it's some corporate reason?

I don't know much about the history of this so if riot has taken in ideas of players where they make skins or champs that players designed before please link it to me because the only champion I have seen Riot ever acknowledge from a player was Kindred and it was mostly just from inspiration.