How to prevent tilt

OK so ill admit that i have a tilting problem. Like ill win 8 in a row and then somthing out of my control happens. Like.. Ill be in trials and the chat will already be negative. Someone gets angry and leaves or afks after 10 min and its GG. So what happens is instead of taking a break right away ill just be like " fuck it ill go f time graves jungle and see if someone can carry me" Of course i lose and then im 2 losses away from where i was and then i just keep doing it until im tilted off the face of the earth. SO LONG STORY SHORT.. I stayed on tilt for like 10-15 games. All spamming ff, all f timing champs being a fuckn bummer. So i took a week off. Didnt play but watched a bunch of coaching vids ( i always watch you tube for help/tips), went out for drinks and just kind of relaxed. I started up today felt great, had great teams that communicated well, and won 2 in a row easy. The third game we just terrible. Jungler takes my top lane WITH SMITE and then just doenst jungle. I was fucked for 40 min because my team didnt want to ff. I can feel the tilt comming and i can tell i wont be able to carry next game feeling like this.

So is ranked just not for me? Im not sure how to not get angry in these 4v5/troll games. And to be honest when i play normals i get laned against gold-plat players and i can tell right away they are good. I love learning from them and losing lane doesnt do anything but give me reasons to get better. I just dont feel that way in bronze losses.

FYI i have watched a lot of NEACE vids to work on my macros/cs overall decision making. I Watched players like KEEGUN to improve my pantheon. I am not lazy and have been trying to get better! Any advice will help thanks.