I own a business that has two main work computers, two phones using WiFi, and 5 wireless cameras. I struggle to get internet connection to the computers.
I have a TP Link Deco and a main router. There is no way to have an Ethernet cable to connect to either computer.
Internet constantly disconnects when I’m on the computer but I don’t ever have any issues on my phone. Our internet service provider says the only way they can guarantee high speed internet is through an Ethernet cable
Buy a network extender or invest in a mesh network.
There is a ton of variables to getting fast speed out of wifi, signal strength, interference, your ISP download/upload speed, network congestion, to name a few, and we can’t figure those out for you over the internet.