I suck at League of Legends... help

I've been playing ranked for 3 days now, and I've lost every single game except for one where the team carried. Every game there's me and at least someone else feeding 1/12 and we lose. Even if I stay in the back of team fights I still get stunned, frozen or rooted and killed within seconds. I don't even engage fights, I am not greedy with jungling, I just do what I'm supposed to do as a jungler. Every game I end up with something like 2/16/4 and get reported. I was originally placed in silver 1 matches and lost 1/24/3 and now that I'm in bronze 1 I still lose. I never asked to be in bronze 1 or silver. All I ever wanted was bronze V.

Anyone know how I can improve and not be completely suicidal all the time? (Even when I don't engage in fights I die. Even when I play safe I die. I even sometimes die if I stay in base....)

I main , and all the other champions I have played suck even worse than when I play . Should I just quit ranked and play normal? I'd like to actually be able to not completely suck in lol because it's a fun game. I should also mention that I don't really want to play another champion because I only really like this champions combos and abilities and only role I like is jungle.