Please help me with league of legends (tilting and climbing)

Hi my summoners name is koreanwinions as you guys can see and i started league in the beginning of season 4. So as i got into league, i found it really amusing and decided to get serious and play ranked; as a result, i got to s3 on my placing matches in s4. i kept on playing it but eventually dropped to s5 then s4 - s5 - s4 - s3 -s2 - s1 and ended s4. Then as we got into season 5, i got placed in s4 in my placing 10 matches so i decided i wanted to climb up so i only starting playing ranked and got to s5- s4 -s3 -s4 - s3 -s2 -s1 -g5- g4 -g3 (i am currently G5) then heres where the problem happened. when i got to G3 100LP, i was doing my promos and i lost due to my own fault twice then i met these bunch of troll players who would find out it was my promos and quit, afk, feed and be negative. so i started tilting and went down to g4. then in g4, i met these bunch of unskilled players who would afk and feed not on purpose but ye... so i dropped to g5 and made a climb again to g4- g5 - g5 but eventually got to g5 0LP, which is where i am now. i do not know if there is something wrong with me or the matchmaking system ; it always seems like the other team gets better players and our players are shitter. it might seem like I'm just a kid who like to blame others but i really am not. I'm usually positive but these days i started tilting because of those people and started making mistakes and doing bad. i want some advice. should i just quit league momentarily and take a break of try to carry as hard as i can.. ty for the support and i will take any criticisms too..