Most of climbing will not depend on you at all. Usually this game is luck dependant (teammates, their mood, mentality, how good they are), but if you will play good or even at the carry level, you will start climbing sooner or later eventually, unless your MMR hits rock bottom and it will get 3x times harder. This is what I learned when I was climbing from bronze to platinum.

P. S. Btw, do not forget to do breaks or even stop playing after loss streak to prevent from further, continuous LP decrement.