Random Internet Drops

I am not sure its a heat problem.  I would think there has to be some type of sensor for this that can determine the temp.  L2 suggested I RMA the units I have and new ones that will be here monday I hope.  After everything tech support has done, the problem still exists and seems to be getting worse.  We cant even stream a movie without it dropping out now.  The other day wile on phone with tech support L2, It took 30secs to over a minute to get the router logon screen. And then forever to load the home page.  The PC is directly connected to the router as well. I was also told that the app should respond very fast with this new router and it can take 10 plus seconds to load page in the app.  When I select traffic meter, it takes 10 or so seconds to load and when I go back and click on the traffic meter again, it takes just as long.  With both these symptoms, Tech support thinks a new device will fix the problem.  I am sure hoping so otherwise I dont know what to do.  We cant run our business with all these drops and online meetings are impossible.

I am not very tech savvy and with that being said, this is just a standard (stock) setup.  We use a lot of wifi devices, bit they are mainly light bulbs, power devices and a dozen or so amazon wifi cameras,