You can't "fix" the amount of people that can play on a server at once. There's a limit to the amount of data that a server can handle, and going over that limit would tank the performance of all players playing on it, if not damage the physical server itself due to overclocking.

Give it a week or two. The queues will sort themselves out in due time. If that's too much for you, then by all means move on to a different game. At least you'll contribute to making the queues shorter that way.