[SERIOUS] How do you get past a "slump" and start climbing elo, after bouncing around the same bracket for a few months.

MODS: This is not a blame submission, please bare that in mind before/if removing this.

Hey Guys i have currently been in a sort of slump for the past few months playing between platinum 2 and platinum 4. recently (this past week) i have been bashing around at platinum2, and got around 7 Series this week alone- 2 of them being successful.

Anyway, i see myself playing and playing and playing, grinding solo queue during my off time from school and work. My goal is to get Diamond before the season ends- as quickly as possible. Today i got Demoted and now i am around Platinum 3 50LP.

Questions:

1. As a support, How can i roam if my adc will die and get all in when i am gone to roam.
2. When i am Support, i die alot less then other team mates, why am i so focused on not dieing, yet having a high kill participation- where as other team members die alot more than me, even after i ward/ gank for them.
3. In team fights, i protect my adc and carries right? How can i protect and peel for them when they are getting smashed by the enemy jungler and tank.
4. I tend to play support alot, and it is my most played role, but i seem to shy away from playing support after a bg, and i never feel like my head is in the game and that i can carry compared to if i go a solo lane
5. When i do go to solo lane i often either lose or go even. But i do look for roams/ 4 ban bot ganks.
6. My OP.GG KDA is 1.7 / 3.3 / 11.6, i think this is pretty good, however some of the games i think we could have won are lost because of others feeding or trolling, yes i get it, you are having a bg and we all have them, but shouldn't they focus on not dieing and helping others and playing safe? (MODS IM NOT BLAMING)
7. i believe my mindset has changed- now i am focusing on myself, and trying to die less / protect my adc- and i would like to think its working however in reality it isnt.
8. I stopped flaming/ Muted the flamers, Tryhard as much as possible but i still lose focus and start blaming my team (in my mind not chat because i now know flaming isnt helping no one)
9. Is it just my luck or are alot of people just trolling in plat? Today i've had 7 people trolling in my 10 games.

Any help getting through this tilt or slump would be greatly appreciative. Because after all i really want to get diamond but its not quiet their yet. Any tips would be good.

OP.GG : http://euw.op.gg/summoner/userName=xx420draven420xx

IGN EUW (feel free to add/give tips): xx420draven420xx

LOLSKILL : http://www.lolskill.net/summoner/EUW/Xx420DRAVEN420xX