I seriously need advice on climbing to Plat

I need some help. I'm playing my heart out trying to get to Plat. Something is amiss. I feel like most of my matches I play very well and set us up for success, yet lately it seems like I've been cursed. I thought maybe it was just the kids out of school and chalked it up to summer time League, but I don't want to use that as an excuse. Here's what I've noticed so far in my most recent losses:

1. People feed beyond imagination. I'm talking 10 + deaths.
2. No one listens to pings. Whether it's for an objective, watch out for a gank, or to disengage. Pings are completely ignored.
3. People tilt extremely easily. One death and the flame war begins. It's all downhill from here.
4. On the death note, people will run right back into lane, re-engage, and die. Playing safe is not an option I guess.
5. Champ select. People pick whatever they just want to play instead of for the match ups or team comps.
6. Kill chasing. People still run around the jungle chasing kills instead of taking advantage of a lead and pushing towers.

Sometimes I feel hopeless with winning and have no clue what role to take. Seems no matter where I go, the other roles fail. I'm not prefect, I know sometimes I suck balls too and I know when that happens. What I need help with, is how to over come these burdens. There has to be some way to adapt to this. Even in the matches I feel like I play well but lose, there must be SOMETHING more I could've done to sway the tide in our favor. I was one win away from Gold 1 and now dropped to Gold 3. It's very frustrating. It's to the point that I feel like I'm going to lose every time I queue up. Nothing to do with personal confidence, I just feel like a lot of factors are always working against me more than the opposing team. I don't engage in flaming, I ward and watch the map, I take breaks and try to play with a clear mind. Maybe I just need some third party advice since I'm obviously missing something myself. I haven't improved enough I guess to reach my goal for this season. Maybe it's my macro play, who knows. Anyway, any advice is greatly appreciated. Thanks.