How to play the object 432U?

Hi, really struggling with this tank and just cant seem to make it work. I really enjoyed the 430U. After i used this its super frustrating. I am using Bounty Vents, Rammer and Stabs. I jiggle and snapshot wherever possible and go to heavy line but I always get penned in the cupola and side scraping doesnt work? maybe its the hull shape or maybe its just tier 11 Gorilla's that just eat this thing up.. I have lost 9 games out of 10 doing around 2500dmg per game. Any tips?