RAX35 not reliable, even when going back to firmware 1.0.3.62

Is my Nighthawk AX4 4-STREAM WIFI 6 Router AX3000/RAX35 actually called by the model name RAX40?! I'M REALLY CONFUSED! I keep seeing the name RAX40 popping up when I enter my router's name and model number here, and when I look into the Netgear forums or discussions it's never really an "RAX35" or "AX3000" anymore?! Also I've had to back and forth switch firmware almost 3 times since last year when I downloaded and installed previous older firmware because the newest version then (haven't even tried to let my router update to the newest firmware version yet) because last new firmware turned my router into a WiFi connection, ssid renaming piece of junk! And to think the guy who manages my satellite ISP highly recommended this router and said it was the high end latest and greatest upgradable to newest technology out of box expensive router! Nothing but trouble, no access control even though turned on, not really much customer support unless you're paying Netgear for subscription! WTH Netgear? I've always known this company since back in the early 90's when internet and personal computers were just beginning available to everybody! I know enough about tech to know that I feel trapped unless I'm paying for something?!