HELP!

I upgraded to a TPLink Archer AX11000 about 7 weeks ago, repacing an old Netgear router that was experiencing severe performance issues with the number of WiFi connections I have at home (60+, including all my smart home switches, etc.).  I bought the AX6000, but decided I wanted something even more powerful and returned it for the AX11000, as that's supposed to be a best of a unit.

Unfortunately, I have had nothing but problem with it since the day I bought it!  

On a daily basis, I experience issues with my connection.  It's usually on my 2.4GHz devices, but sometimes affects the entire network.  I have a relatively small bungalow, and my router is wall-mounted in my basement, with only that area and my first/only floor to cover.  

ISSUE #1) 2.4 GHz Network - I've noticed that intermittently, I will either lose connectivity to some or all of my 2.4GHz devices.  This includes my TPLink wireless switches at home, my smart speakers, Sonos speakers, security cameras, iRobot devices, Chromecast, etc.  Devices just intermittently stop working, and I have to reboot the router (or the device) to be able to see it again.  This is infuriating, as there is no rhyme or reason to it.  For example, In the Kasa app, some switches will work, while others are totally offline, and others still are "Local Only".  I have researched and tried changing the 2.4 GHz channel width and channel settings from Auto to various different options, with no success.  It's like it's just giving up.  

ISSUE #2) Router Stops Responding - This has happened on several occasions, with absolutely no wireless coverage for any device on either of the 3 wireless channels (5 or 2.4GHz).  This morning I woke up and all my devices were offline; I couldn't log into the router at 192.168.0.1, and had to physically turn the router off and on again to get it back up and running again.

I've checked the logs, but they're pretty much useless, and ALWAYS default back the July 19th 2021 for the first several lines (example below) before setting the correct date, after which there's not much to tell me what's going on.  

I'm stumped, but I'm also very very frustrated.  This is a $500 router that I bought so I could stop having exactly these types of issues with my previous router from 2013.  These problems are even WORSE and occur far more frequently than before.  I have e-mailed TPLink support asking for help, but so far no response, so now I'm turning to the forums for help.

Since I work from home every day (even prior to the pandemic), it's important that I maintain a stable internet connection.  Also, because I run a fairly robust smart home with routines and security all built in, my network is essential.  It just can't keep dropping like this!

If I don't find a solution to this problem in the next couple of weeks, I'm going to replace the TPLink with the ASUS ROG Rapture GT.  

2021-09-26 09:10:55 UPnP INFO [11103] Service start

2021-09-26 09:10:55 UPnP INFO [11103] Service stop

2021-09-26 09:10:54 Remote Management INFO [10812] Service stop

2021-09-26 09:10:50 Traffic Statistics INFO [8998] Clear all stats because time changed

2021-07-19 00:00:31 NAT INFO [9495] IPSEC ALG enabled

2021-07-19 00:00:31 NAT INFO [9495] L2TP ALG enabled