I'm hardstuck gold I need help

So I've been grinding ranked ever since s1 reset from bronze and quickly pelted through bronze and sliver but then I hit gold and the progession stopped. I mainly main Mr fantastic with about 10+ hours on him. I thought about playing another dps but there either too hard or don't suite me. I get one win then 3 losses then 1 win and even if I play for a whole day I'll be where I started. Idk what to do anymore