bronze playing with with diamond players help! Pro coaching needed!!

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A few things to know before that may make this easier. I ended up being in a game with a smurf who was leveling up his account. He liked how i played so he said we should duo. Honestly its been a blast, had a good winning streak where i won lane and even carried.. But currently having some bad games and need advice. So in this game the first 5 min you can tell i play like a bitchh. I was kinda in tilt and maby not as confident so was not as agressive. But after level 5 i start to actually do well my game is a lot better. The Problem is they lane swap and i get countered against a kayle. I made the decision to leave lane because prior games i stayed top and still lose. MY build is also experimental since i figured id try new things if what im currently doing isnt working. I know if i stayed to 1v1 kayle i would be useless but i donno maby i should have stayed? Anything i could have done to stop the bleeding?

(We had a diamond 5 player on my team, and a Platinum 1 player on the other team as fas as i know of not sure what the other players rankings were )