Brake Drum Wheel Cylinder problems of the 2012 Honda Odyssey

I have had the same problems that everyone has since I bought this van new (may 2012). Around 41,000 miles (Aug 2014) had warning lights & codes come up. Honda replaced cylinders 1-3 & work order also showed service bulletin 13-081, repalced under warranty. Then I smelled oil & saw a small leak in sept 2014. Honda found leaking valve cover gasket, replaced under warranty. Took van to florida. When we got there we had to take the van to a Honda shop for a low tone knocking noise while idling and louder when accelerating. They had the van for 4 days. Honda provided a free rental. Honda wrote on work order. 43307 worn camshaft lobe causing knocking noise 36108, performed inspection found noise coming from front cylinder head, called techline, techline instructed to inspect for worn cam shaft, pulled valve cover found cylinder #6 intake lobe worn. Removed and replaced front cylinder head camshaft & camshaft seal. Noise gone. It also responds better when pushing gas pedal & gas mileage improved. I bet I have had about $5000 worth of warranty work done at this time just from under the hood. During all this, I contacted the better business bureau & Honda was notified. I have been complaining to corporate Honda from the beginning about this van & they always would say that nothing is wrong. Finally I get a call from corporate Honda to tell me they found nothing from my visit involving replacement of my cylinders. Boy was he misinformed and got an earfull. I have also had my front rotors resurfaced (35,657 miles), got a goodwill warranty. They should give a goodwill warranty with all the Honda vehicles we have bought. Each van I buy (1995, 2005, 2012) gets worse and lasts for a shorter lenght of time before I feel I can't trust it for a trip out of town. I am starting to experience little issues again like I did when I first bought this van.