I've tried disabling WMM support, and that does nothing

After some googling, I discovered that disabling WMM Support in the router (under the "Applications & Gaming > QOS" menu) fixed the problem

After reading the reviews for this router, someone suggested turning off WMM which boosted their speed even more

I did take the internet forum recommendation and disabled WMM which tries to prioritize media traffic, which could slow it down, but since i'm not really concerned with that prioritization I turned it off.

I went "Applications & Gaming"/QOS and disabled WMM as people have mentioned and it did have a bit of an impact on the speed, but not the super amount I expected.

this point, I could have re-installed the original Linksys firmware for the router, and tested whether disabling WMM Support would fix the network stability issues.

Also, R. Palm's review about disabling WMM Support is spot on.