Hello, I have an RT-AX86U Pro using spectrum's ISP. I've been struggling with bufferbloat and was able to get rid of it with a combination of cake QoS and limiting my bandwidth to ~200-300 up/down. I can get a max of ~1gbps up/down but if I don't limit my bandwidth this low I can't get an A+ on waveform's bufferbloat test. I play PC games with ethernet so I'm not sure that changing my WAN settings would even do anything but basically I'm trying to keep my A+ while utilizing more than 20% of the bandwidth I'm paying for. I'm an absolute beginner with this stuff and just bought my router last week so I apologize if I'm missing key information here.