How to avoid tilt. (I just want to improve, but my tilt f*cks me up)

Hello there! I'm Givifa, still in silver 3 but, improving a ton. Still, I get f*cked by my tilt. For example, when I'm trying to get better at freezing my jungler stops my freeze because he wants to pick up some cs. Or when someone has no sums and, low health and the jungler is doing his chickens. for example, he can easily run to the mid lane and take a kill. I nearly never get tilted by other lanes. But I'm always annoyed if the jungler doesn't know what to do. Now I have 2 permabans and 2 accounts around level 26. Can someone help me to stop my tilt so I can focus more on improving?
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