5ghz has borderline zero barrier penetration ability. A magazine can kill the signal. If you're trying to use it in another room, there's your problem.
I still haven't found that fucking edgerouter btw. My advice would be to get a Ubiquiti USG, ebay gigabit poe switch, and just drone ebay for cheapo ubiquiti APs. Not the old APs though, pieces of shit don't even have gigabit ethernet on them.