Primary Role Selection

Hey guys! So i know this topic has come up several times, but i'm just wondering if anyone knows about the work going on to increase the amount of times u get ur primary role. I just played an entire series to plat 3 in my secondary role, a 3 game series. Its really frustrating when you practice so many hours out of the day doing one thing, and then when it comes to showing everyone that u have what it takes, you can't because the queue doesn't let you play that role. I main bot lane adc, and jungle is my secondary. Now correct me if i'm wrong, but people want to jungle, I don't know why i'm being selected for it 3/5 games. I use to have problems getting jungle when i use to main it. If anything, maybe riot should implement a way to tell each player, what role they will be playing before they actually accept the game, that way they can decide whether or not they feel comfortable playing their secondary the last game of a promo. I understand that the queue is made based on players selecting different roles, but there HAS to be a better way of getting players the role that they are best at. If not, i will be forced to Thanks guys!