@tdnyc I have had a BE800 for 2+ years and haven't had any issues like that with it.  I am currently running the beta firmware on it and have not run into any issues.  Are you in a populated area?  Might be interference from neighbors causing some issues.  I was running the 1.3.2 until the beta one came out.  If I remember right I did a factory reset after applying the 1.3.2 version.

The beta firmware can be found here:

Archer BE800 V1 Support for VPN Merge, Guest/IoT Network Extension via EasyMesh, and More! - Home Network Community

If you install it, you can NOT go back to the 1.3.2 version.

  @DVair Thank you for commenting. 

I do live in a populated area (I live in Midtown Manhattan.) However, the device was functioning flawlessly before. I believe strongly that problems began when I performed the update.

Perhaps I will investigate interference again (although I don't think that's the issue, since as mentioned above, it was working fine before.)

I believe it is a software issue because performance gets worse over time. I have configured it to reboot every day now because it becomes almost unusuable if I don't. This is indicative of some kind of resource / memory leak usually.

Thank you for the link to the beta software. I am not likely to install beta software knowing that there is no easy way (or any way) to revert it.

I find it completely unacceptable that you can't revert to a prior version of the software.  For anyone reading this, I strongly recommend that you don't purchase this device. It is quite expensive and the situation with support and software updates is completely unacceptable.

 

  @tdnyc If your network setup is not too complicated, I would recommend doing a factory reset and manually setting up your network.  That helped me with some previous versions of the firmware.  (was also a D-Link user prior to getting the BE800)