Should I get a new router

Internet: centracom centrawave wireless 500mbs plan
With around 20 devices.
I recently moved to a pretty isolated area and the only choice in internet was centracom wireless, and it works great for the most part I’m getting reliable speed and it hasn’t disconnected randomly,

however when I try to play any sort of online game such as cod bo7, DBD, deadlock I have issues with lag and rubber banding, in cod it says packet burst nearly the entire time I’m playing, and I’ve made sure it wasn’t a hardware issue so the only thing I can think now is a internet issue.

I’ve used the bufferbloat checker and I get a score of C so I’m wondering if I should maybe get another router with qos or if there isn’t really much I can do

So I thought I would ask you guys! Let me know what you all think