There are a lot of arguments why NOT to divide the standard/ranked, some people say when there was ranked no-one was playing normal queue and the ones that were playing were basically trolling. And even with single queue, given good matchmacking system they can match new players with new players and tryhard eternus5 players with other tryhards. So basically the single queue is not the issue for that I think.
But 100% agree, there should be a solo queue and teams queue, it's impossible to play against a 3-man as a team of randoms.