Not getting assists

2nd time I have not received my assists as a support. Once as Blitzcrank and now as Braum. Don't know what the problem is but auto's and skills even my ult didn't get me assists. It's really frustrating because then I get reported for not doing quote: anything , and then I get reported even though both games I had out damaged my jungler and usually another laner. Just don't know what to do it makes things frustrating and leaves me open to getting harassed by the trolls of the rift for not having a k.d.a