@HiWing This is your third post on the Duet3D support forum, none of your previous posts have asked for help. If you want help, ask, and supply some information we can help you with (machine details, current config.g, M122 report). If you're having problems with firmware updating, check this guide. If you suspect a hardware problem, follow this guide, and ultimately our warranty support is robust. I can't help you if all you post is negativity with no content, and that attitude won't help you get support.
Of course it's easier to set up a fully commercial machine. The company that produces it has complete control of hardware and firmware, can test and tune it before it gets sent out. I appreciate this about the commercial printer I bought, it's pretty much plug and print, even though my intention is to swap it to Duet eventually. That's the part you have to do yourself on a custom built machine, or conversion. We offer tools to make the process easier, for example the RRF configuration tool, example configurations for machines (though while you may have the same machine, you may have wired it differently) and extensive guides and documentation. Then there's the forum here to ask questions directly to support staff, and even the firmware developers, for anything else. I doubt your commercial machine is as well supported, I know mine isn't.
If you have any suggestions for 'making better tools to make the user friendly', we're listening.
Ian