The problem with normal games when higher ELO
I don't play normals much anymore, perhaps once or twice a week to get first win.
What I noticed is that I never get matched up with people of my division (high gold), rather I get lvl 20+, unranked, bronze and silver. That is both bad experience for myself and enemy team. If I get fed I can carry the game easily against them, they lack the mechanical knowhow I have and the experience. It can also be irritable when they feed 10 kills in 10 min or less.
So try to fix it so you get matched up with people from your division and one lower.