Use as desktop shell

I want to use this as my root window manager. Unfortunately I get weird window behavior and visual artifacts if I set it as such in my /usr/share/xsessions/chromium.desktop eg.

[Desktop Entry]
Name=chromium
Comment=This session logs you into Chromium
Exec=/usr/bin/chromium
TryExec=/usr/bin/chromium
Type=Application
DesktopNames=chromiumos
X-GDM-SessionRegisters=true
X-Ubuntu-Gettext-Domain=chromium

Describe the solution you'd like Works like a normal maximized chromium browser.

Describe alternatives you've considered Stick with gnome

Additional context Multi monitor support eventually would be nice, but for now I'd be thrilled with just normal functionality.