Desktop renders slowly despite high resource spec

Hi all,
I’m using whonix via kvm. I encountered issues with the desktop rendering slowly (jumps when scrolling and trying to play video in fullscreen results in freezes) I tried giving the VM more CPU’s and RAM (6 VCPU cores and 6GB of RAM) but the issue is still there and CPU usage is nowhere near maxed out (only ~20%) does anyone know what might be causing this? Thanks,

btw I run stuff where anonymity is a lower priority (or not possible as I need to sign in) though my regular desktop and vpn using privacy friendly browsers, what other measures can I take to minimize data collection when anonymity is not an option?