I agree it wouldn't be hard to just play 5v5 ranked team, or just a 5v5 blind pre-made with a set age group... cause thats what i do. Im 34 and i play with a group of people all about my age, but ill tell you now, all that Moakai mid stuff still happens. It happens because its fun to do and some of us just want to have fun at the game, while the rest of us are mature enough to not care.
A vet server would not fix anything except maybe the type of raging that you see. If your main problem is people wont play the champions YOU want them to play your not going to find any multiplayer game very fun. Maybe rethink whats actually got you annoyed about this game, is it because you lose to much, or is it because you cant dictate how and when everyone plays this game?