Again, you fail to notice that you are not skilled in one game mode.
This is not COD. Games do not last 5 minutes and some people don't want to play game modes that are poorly balanced. No one else wants to waste their time playing game modes that they don't want to play. Creating Dominion cost Riot an extortionate amount of money and hardly anyone plays it. It was quite a failure, Summoner's Rift is on the world stage now, the last World Championship had a 2million prize pool. It didn't include the other maps; only the 5v5 map.
Instead of spouting off ideas just to "improve" the game, give ideas that actually have some substance to them. Capture the Flag would be a great idea but actually make a feasible idea. But i think that these games would just become another Dominion and become a gimmick so to speak.