Please Help Me Understand How to Climb From Silver V

I've been playing league of legends for over a year, and I feel like I still do not posses League "IQ". I am decent with mechanics of several champions but I feel like I am missing major components of how to play league. I find Yasuo, Blitzcrank, Warwick, Darius as my favorite champs but sometimes I just have many losing streaks with them. Please Help! I also have trouble facing poke champions such as teemo, azir, fizz, and ahri so my csing is affected by that.
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