How can i climb?

i started from silver 5 in this season. It was really easy to climb up from s5 to 2 but now i cant win. Soo i can win but im between 20-50lp everytime and i cant get more. My main lane is jungle and i usually play with jarvan, xin zhao, shyvana and master yi but i cant play with him very well. Is there any tips which may help me to continue my climbing?
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