NETGEAR XR1000-100NAR WiFi 6 Router

Not sure if it's just the unit I received being defective (exchange is in process now) but I had a 7 year old router, that was running a bit slow when gaming on PS5 and streaming Netflix on a separate TV on the second floor; I was using it in conjunction with a nighthawk range extender. I did some research and ended up going with a new modem(Netgear) and this router as it was supposed to have an easy connection between devices. I set up the new router, and it was very simple and fast, as well as getting the extender added to the network. Literally a few clicks here and there and that was it. I had some 2.4 only devices such as the ring doorbell and lightbulbs, and after using the smart wifi where it runs both 2.4 and 5g out of "one network name", picking and choosing for you, what goes where, I had no issue setting those 2.4 only devices and connection. A few days after, lightbulbs and Alexa's were disconnecting daily, and just not working right. The ring would not pick up movement and will ask to reconnect..I the swap to having a 5 and 2.4 network separately, and connected all the 2.4 to the 2.4 network and used the 5 for videogames and streaming. The range was great and tvs upstairs were streaming with no issue. But then again, all the lightbulbs, Alexa's, ring, fridge would get disconnected randomly and had to re set all devices in at least 3 separate occasions within a two weeks period....I would also wake up to a "no internet connection" in all devices in the house, and had to unplug the router, give it a min and re plug, for everything to work again. This happened several times and leads me to believe, that the network went down overnight, which doesn't help when you want to have your security cameras outside running when they are most needed....the extender had to be re connected several times as well, and when I go on the app to see devices that are connected, no devices show as being connected to the extender at all, which makes no sense specially with items that are a foot away from it....the nighthawk app is also a pain. When you connect to it locally, it crashes all the time when you launch devices connected or do a speed test. Half of the time it works when I try to use remote access and never finds the router. I also am unable to shut off wifi to a device on the network, using the app, like you are supposed to be able to do by just clicking on the device you want to disconnect. It freezes every time and keeps it connected. So far, the router is trash, but I am really hoping I got a bad one, so I will give it another shot, and try the replacement one.