Can't deal with autofill BS... Gonna main support

In my last 6 ranked games, I got my primary once and autofill support twice. I've decided that I'm just going to guarantee a role I know well and have. AutoI have decent mechanics and sense of laning but I feel like I lack in map awareness and macro. I struggle with identifying my job towards the mid game and establishing sufficient vision when the enemy is ahead.

Will any experienced ADC's duo with and critique me to help improve my support play?