OpenWrt support for Zyxel WSQ50

I have a Zyxel WSQ50 (AC3000 multy x) Router and I gotta say: the firmware sucks. So I'm looking for an alternative and I wanna try OpenWrt.
Problem is: my device has unknown status for OpenWrt support as far as I found. I also didn't find any ways to install custom firmware on it.
Now I'm wondering if anybody found a way to do so and could give me a rundown for the process or nows whether or not this is even possible.


Hardware specs for reference:

Based on that information, the hardware should be supportable - but someone (e.g. you) needs to do the developing work.