I hate to be the bearer of news Kansans can't stomach but the solution, like the problems, is largely political, and this forum is pleasant in no small part because it's devoid of the political horror show that's allowed elsewhere. But I'll try to minimize the partisan aspects as much as possible while still answering your question:
1. Strictly regulate guiding and leasing.
2. Properly fund your state wildlife agency. Prioritize public access over private profits. Stop electing shills for industry and expecting them to do something besides shill for industries.
3. Hunting is a rural pastime and rural Kansas is dying. The general population is getting older. The hunting population is getting older even more quickly, and older people are dying or not hunting anymore. Meanwhile neither the state nor the hunting community is replacing them with young people, much less young people who hunt. That's not unique to Kansas. In fact, I think even Kansas's non-resident hunting numbers had begun to decline before COVID. That should tell you all you need to know, but the truth is sometimes hard to face. Especially when there's an intellectually lazy way to lay blame at some one else's feet ("OOSers take all OUR birds by deer hunting!"), that simpletons go around cutting and pasting on every internet board they can find. It is especially hard in a place with politics as radical and fringe as Kansas, because the young people who are born there flee the social, cultural and political climate of Kansas to a degree that doesn't happen as badly in moderate to states, even agrarian ones, or states with better functioning economies (and Kansas' economic woes are as much a function of it's radical politics as anything else). Young people who aren't from Kansas recoil in horror at the thought of living there, because everyone in the rest of this country know how far into the fringe Kansas's politics are, and there's not an economic or cultural reason to ignore them. Add to that the fact that there is not an urban area of size or import in Kansas to attract young people, save for the suburbs of a pleasant but not particularly remarkable city in Missouri, nor even a well-funded higher education system to attract them for their college years, and you get to sleep in the bed you all made.
But by all means, make non-residents draw lottery deer tags. I certainly don't object. I've drawn lottery tags in actual big-game hunting destinations (the only game species Kansas is a legitimate destination for are bobwhite and prairie chickens), it's never bothered me in the slightest. I would put in for the a deer draw every year in Kansas because I hunt with a good friend on a his farm that's been in his family since the came from Ireland in the 1850s, and I have enough money to spend some on being sentimental. But it won't make deer hunting in Kansas better, it won't improve access, and it won't reduce leasing or guiding. The only things that will accomplish those tasks are Kansans deciding to prioritize those things politically.