Ira, Keep fighting the good fight. I have been on our committee foe 28 years and served as chair. Same roles for our regional association which has its own agronomist and and the superintendents confirm that they all have similar problems. Even my Dad was a greens chair at his clubs and we had a problem in the 70's. The problem is universal. We have implemented every one of the suggestions made here and they help, but the problem persists, Some of us will play a late round and spend as much time fixing marks as playing. You just have to keep working at it understanding that the problem won't go away. For the classicists think of Sisyphus.
I suspect that the irony is lost on most- reference the thread on a proposed redevelopment of a Seattle muni into high density affordable housing- but we've been rolling bolders uphill for decades only to watch them roll back down, over and over again. If history repeats as it often does, in 10 years the city won't have a golf course or an area of housing that while "affordable" is mostly unlivable. A culture which demands personal responsibility is the only solution to the much wider problem.
My home club has firm TifEagle greens which don't mark easily, but when the sun hits them just right, they look like moonscapes. We also have bins of plastic tees that our members reach into for a handful at a time and proceed to leave them on the tees, fairways, bunkers, the floor of the locker room, the parking lot, etc. The offenders are of all ages, occupations, economic status; some are people I know and like, but ....... Pre-Covid, I would pick up tees and trash, fix multiple ball marks, rake bunkers which were skipped by uncaring members. I now mostly just tap down the worst ball marks, leave range balls scattered throughout the course, and otherwise try to stop thinking about the shortcomings of human nature. It is just too depressing.
I have seen a club culture at two places where you don't find tees laying around, whole or broken, unfixed ball marks, and trash on the course. My hosts at the two clubs, Crystal Downs and The Golf Club, made short, general comments in the front end about the expectations of its members, and led by example. At TGC, the member found a cellophane wrapper in the rough, put it in his pocket, and proceeded after the round to present it to the GM with a couple short comments. The GM, no other than the late Fred Taylor, by then the former basketball coach of Ohio State's NCAAA champions, thanked him for bringing the matter to his attention.