I don't see the benefit of kicking someone when he has troubles?
There are polite ways to offer suggestions and even identify possible causes or actions by a poster that may have caused their problem. In this situation I don't see it as the OP's fault. Poor quality control.
Kudos to Michelin for doing what they should and protecting their good name.
Kudos to the seller of the RV for stepping up and splitting the cost of tires with the OP.
Kudos to the OP for sharing his experience and SURPRISE at the condition of these MICHELIN tires after such a short time. I would have been surprised and disappointed, too.
Shame on those implying he unfairly called out Michelin on this issue for some "greedy" purpose!
I didn't read all the whining posts from grouchy folks in between, but see you did get a satisfactory result and resolution from Michelin and hope you enjoy your new rig!