I feel the exact way you do. I have been stuck in bronze all last season and had almost given up on playing league until I found out about the Chaos Vanguard.
Playing with the people on there have really made league fun for me again, and have helped me learn by leap and bounds in various roles/champs from fellow members around me. Also, it's really easy to find people to play with usually as well. Ever since joining, I've been preparing myself for this upcoming season and excited to climb rank again.
Feel free to add me to ask more or just play games ahahah I'm always down to game.
http://thechaosvanguard.co.uk/
This the website if you're interested in checking it out yourself as well.
Hope to see you online on the rift or on the Chaos Vanguard =]