That's unfortunate, but as I said what you might expect? Your only legal claim is with the guy who sold it to you. You have no contract with them directly, since you gave them no money ('quid pro quo' again). They no doubt have an agreement with those 'down the line'.
They had the option (their call) to honor a warranty on their own but chose not to for some reason. We can only guess why, but typically units are offered at lower costs to Dealers with agreements covering such returns (which can be extremely expensive, wiping out the profit from a pile of other units). A place I worked for years ago made electronics for the Marine industry. Our price to Dealers was variable, those who agreed to cover warranty costs (service calls to random boats in distant harbors are a huge cost to us), in exchange we sold at lower cost to them and fixed and retested units they removed and returned to us for free (shipped back to them) for a year from date of sale (if they could confirm, otherwise from shipment to them) and a flat $25 for those 'out of warranty'. Many of our Dealers offered 'lifetime' warranties since their cost would be limited to their labor, shipment to us, and $25 worst case. They often made more sales providing such CS to their customers. At our option we'd cover individual the same way, but most preferred 'the Technician' to make the install and testing (some units need alignment out of the box to match the RADAR on board). That's how I know the rules.
If you'd bought directly from them it would be different of course. If you had bought it from say PIU or PV, they would have already replaced the unit for you and would be now getting compensated by Arizer? That has real value IMO when things go wrong. You still have legal recourse with the guy who sold it to you, hopefully that will work out?
While this is unfortunate it's too bad it's soured you on Arizer in general and any product they make or will make. I think in general their products are excellent (although it might turn out the display on Air II is frail?). The key to good Customer Support, should it be needed, seems to be in selecting a Dealer with a strong reputation for that.
Good luck with it.
OF