My Thoughts, I'm Annoyed

I will start off by saying I have been playing League of Legends since season 2 and I really do like the game over all but I have reached a point that I don't know if I want to put up with the way Riot is taking this game. I will also say I am not a great player but I do not go on tilt and yell at everyone when losing, I have in some games told players who were complaining to shut up and play there best as I always do. To start this season I won 5 out of the 10 placement games I was in and still got put in bronze 4 this was annoying to me. I worked hard and got myself into series to get into bronze 2 a few times but the last time I got near there (I was at 99 points) I started getting the worst god awful players for like 10 straight games: I will say out of the 10 game a few I did not play well do to the rest of the team not playing well. I was around 14 points in bronze 3 and lost a game and ended up getting sent all the way down to 75 points in bronze 5(what was up with that?), when this happened I got angry and stopped playing for a few weeks, came back and continued the losing streak all the way to around 20 points in bronze 4, since then the games have been win one lose one, some loses do to players leaving the game. I have noticed for some reason if someone dodges during the champion selection and I stay in the queue the team I get put on ends up losing don't know why but this happens very often. If I leave the queue I have to wait for a few minutes to queue again as I get stuck with the same group otherwise. I often also queue up for my 2 roles and get put into a different role even if I pick support as one of those roles which seems to be what is normally needed as I do like playing support but then I am really dependent on the rest of the team, as the champions I play as support are not likely to be able to carry the team. just yesterday this happened I sign up for mid/support and got put at the top lane and then one of my own teammates banned my champion I wanted to play, yet if I dodge I get the dodge penalty and have to wait to play all because another player banned me out. These are the things that cause me to question why I even play this game. one thing I have decided I will not spend another dime for anything in this game again until at least some of these issues I have are taken care of. I just wanted to let you all know how I felt, I realize it's not likely Riot really gives a shit for a player who aren't really that good. I will continue to try but my wallet is sealed for now, I don't give up!