Wired Internet but Wireless internet is Intermittent - I can connect wirelessly to all devices.

I just bought this router and it is having issues connecting to the internet wirelessly; I can connect all devices wirelly to the device.  All devices wired to it work fine (Arlo, ADT Cameras, DirecTV, Laptop, Ethernet Switch with even more devices).  Strange enough, the 2 Amazon Echos work fine, a couple laptops have issues.  I just tried to reconnect my fridge and it connects fine to the router, but gets no internet.  Same with my thermostats and all Galaxy S8 phones (5 of them!).  I have to switch back and forth between the 2.4 and 5.0 networks and after about 5 or 6 times, the internet works.  Once connected, it stays connected though.  Its just going home and trying to establish a cennection.  Also, if I want to make any change that requires a router reboot, forget about it.  I have to go through hell to get everything connected.  I have one wired XBox one and one wireless.  The wired works fine but the wireless has to be reconnected about 5 times before it finally says it is connected to the internet.  I am about to bring this thing back to Best Buy if I can't get it to operate soon.  Thanks for any help!