TP-Link routers has always been shitty. Their official firmware is worse.
The only reason why TP-Link is still alive is because their prices is cheap & 3rd party firmwares help saved their company.
Without OpenWRT/DD-WRT, TP-Link would've been dead already.

Not hate speech nor a die hard fan of ASUS.
I'm here speaking on years of experience in using both TP-Link & ASUS.

TP-Link TL-WR1043ND v1 - Only acceptable when using OpenWRT. On official firmware, the WiFi function keep disappearing. Not WiFi channel issue, but the firmware itself.
TP-Link TL-WDR4300 - Worse router ever. Even OpenWRT couldn't save it.

ASUS RT-N16 - 5 years old & still running strong. Not to forget that ASUS still produce firmware updates for this model until today eventhough production for this model has been stopped for 2 years.
ASUS RT-AC68U - Best router I've ever had.

The point is, TP-Link doesn't give a shit about their customers.
Sure, we've heard how bad ASUS is when it comes to warranty but TP-Link non-existant tech support is the worse of all.
ASUS on the other hand have their own tech support guy in our forum that will answer all your question.

You get what you pay for.