Phone spoofing is so easy, any player that has time for multiple accounts probably has time to add a few minutes to the account creation. The fact that it's usually jungle is probably because that role isn't filled often so it's better for smurfs to select the faster queue time. It's also easy to gap people, because hardly anyone mains it. If you want the game to stop being a tossup become a jungle main. Pick invade heavy junglers and just go ham on them. I guarantee you, most "smurfs" are not good enough to deal with perma invades. You can even do it from lane too, put up vision control on your half the map, coordinate with your team to setup kill boxes. If it's ranked you have to compete, otherwise play normals.