I can second that. I'm honestly surprised I even got that far with that random assortment of hardware and 75-ish clients.
The first time I was thinking that I maybe need professional networking equipment was when the TP-Link router told me that I can't assign more than 32 static IPs. I thought...
Oof, seems like they should maybe just quietly stop selling it and never talk about it again. Unfortunately one usually finds these informations only after the fact.
I'm just glad I can still get my money back. Only a few wasted hours, but wiser in the end.
Heyo,
I decided to abandon ASUS, but thought I'd drop my gathered info in case it can help you or somebody else along.
The background
I've accumulated a mishmash of TP-Link hardware of all sorts and ages over the years. Routers, switches, routers as access points and switches, access points...