I also noted this and expressed my concerns to ASUS at the time, ADAPTIVE QoS does have a Game Icon, but this made no difference and was not suitable for gaming.
Adapative is simply not suitable for realtime gaming at all.
I thought this might be of interest
Thank you for the note on fq_codel, I was wondering if something like that may be the case, now that is known I don’t need to experiment with custom firmware just yet.
You must be a Network Engineer by trade 
In a completely sane world, madness is the only freedom (J.G.Ballard).
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