I find most consumer-grade Wifi routers make more than adequate ACCESS POINTS, but they suck at being an actual ROUTER. My TM-AC1900 (rebadged RT-68U with a T-Mobile logo on it) would need to be restarted daily, after I finished setting up my homelab two months ago I put a Ubiquiti EdgeRouter X in front of everything and just connected the old router to my switch and put it in AP mode, I haven't had my network die out on me and require reboots in months (with the exception of my cable modem going out).