Utah's is by far easiest, I think. Love that it throws a flag before you put in because you haven't purchased the qualifying license, and then immediately gives you the options for the qualifying license. No guesswork as to what is classified as "qualifying."
If Colorado did the same thing and gave you step-by-step prompts, it would be right up there. I love their hunt code system in many ways, just wish they could dumb it down a bit.
Montana is garbage. I tried once a few years ago to start playing their game (in-laws live up there), and after like an hour trying to wade through their crap, I got pissed and closed it down.
Wyoming is pretty bad too.
No experience with Arizona.
But if I'm being totally honest, they all kinda suck. Wishful thinking, but if only there was somewhere like an Amazon for hunting applications. You just scroll through, add what you want, and check out all at once. It would make things so much easier. Add pictures and color code everything and just click where you want to hunt and when and it'll auto-populate your options. Somebody smarter than me, can you get on that? Please and thank you