Silver 3 Help

Ok so i made a new account to get out of bronze, watched a lot of coaching vids/pro vids ect. Did a decent amount of work to get better. I placed silver 3. I Won the first 2 and did actualyl really well. I was like wow this is going to be easy/fun. But its starting to get pretty scary. Like i just had a team go 0/6 in first 5 min 3 games in a row and got hardcore tilted. Like i im not going to lie i was heated after a few games. My team will say "lol dont worry its just 6 deaths we got this" Are they right? This really discourages me to want to climb what can i do to stop this from happenening??

ALSO THIS IS IMPORTANT. I notice these players that go 0/3 in first 5 min are One timing a champion in ranked.. this sends me on full tilt. FUCK i play so much better when im not tilted anyone got advice to stay calm in this game? I smoke a bunch of weed. I love music, i love it. But if im losing in lol music goes right past my ears. I need some help before i start a bingegame tilt to B5.

If you guys have a link of a game where you came back after your team starts out 0/8 or somthing that would be the best! I need to see it to believe it i guess, thanks !