Fair enough statement, bottom line I use my truck for off roading, not as a pavement Warrior and with that said .... I've never had any issues with my old 2019 Tral Boss soo yes I am disappointed with my ZR2, maybe more with the dealership for the statement they made and not covering the Alternator. It doesn't matter if you believe me or not, it's a matter of me venting my frustration with this truck.
Not to add to your frustration, I'm sorry that this happened of course, but if you have 9k miles on it and this is the first time you've taken it "mud bogging", maybe you do use it as a pavement warrior. If you have taken it off-road prior to this without issue, then maybe it wasn't unreliable to begin with?
A broken axle, dropped drive shaft, blown engine, busted differential, or faulty transfer case I could understand being so mad as to make a forum name "Don't buy", but an alternator? lol, that's a little like complaining a truck is no good for off-roading because of a battery.
I took my ZR2 through hundreds of miles of intensive offroading with only a few hundred miles on the odometer in Hot Springs Off-Road Park last July, it was near 100 degrees and several vehicles with us had blowouts and breakdowns, there was mud, rocks, boulders, steep inclines and declines, and my truck had zero issues.
Is there more to the story about the condition of the vehicle besides the alternator? Did you sink the front-end and flood the engine bay and that's the reason the dealer gave for rejecting warranty claim? An alternator is not a huge fix, even in modern vehicles, it seems odd they would reject a claim without other factors being present.