State of the game and match making

Can we accept that maybe hashinshin kinda has a point? I mean you can't do anything about an adc that isn't behind if you aren't another adc or a tank loaded to the brim with cc. I feel like this is going to sound like a copy cat statement, but I found that I could really pop-off playing jax jungle not too long ago, and that I could play off tank camille and do well. but now, unless I'm playing support (which I do often), I don't feel comfortable playing anything but a long ranged ap midlaner or a tank. I'm still learning how to play adc, but I'm not comfortable playing skirmishers and duelists anymore, which used to be my favorite classes. And there is a point to be made about there being too many shields and heals. Supports shield and heal, thats what they do. But when you can't kill an enemy because you get them down to 10% hp and suddenly they have 40% hp or a shield for a quarter of their health bar, or both 3 maybe even 4 times in a team fight then there's a problem. And whats worst is that everyone has a stopwatch and it seems like every champion has to have a dash or a blink these days.

secondly, match making needs to be fixed. I was determined to work my way up to at least silver 1 these season. And I was well on my way to silver 5 but as soon as I got into bronze 1 someone had to leave, disconnect, feed, refuse to co-operate, play something stupid, or afk after 2 deaths. This is too much to be mere coincidence Riot. I was on a winning streak, why am I suddenly being matched with people who are terrible, toxic, or on losing streaks? Instead of matching them with players that are actually doing well, why dont you match them with people who are just as bad as they are and put them up against players who are doing the same thing they are? It's ridiculous. Don't tell me that this type of match making is intentional, under the premise that good players will help them out by carrying the game or some crap like that, please tell me this is an accident. If it is intentional, then how am I supposed to carry a game as a support with an afk adc crybaby, or a inting nasus top, or a jg that camps the only lane that can't be saved?

I think I'm going to stop playing league for a while. I can't take this anymore. I'm tired of feeling like I'm improving and climbing, and then getting dragged back down by the absolute worst teammates i've ever had, each time! seriously I feel like every time I've seen the worse there is, and then some other ass MF comes along and says "this thresh can't last hit for shit" when I literally can't last hit anything because she last hits every single minion before i can finish my aa animation when I have full stacks on relic shield and she's low on health. I'm tired of having to do their thinking for them, and I feel like every time I don't play support bot lane feeds.