Sullivan Honda

We have a Honda CR V .(2017) Car has had a number of problems (mainly electrical). We purchased the extended warranty(expensive). Dealer has been responsive to addressing all our issues with rectifying problems. Problem is that every time its fixed, it's not totally fixed. they don't seem to trouble shoot the entire issue and another issue will rise up spinning off of the item that was fixed. Living an hour away this gets old. (Having to spend half our day dealing with car again). Example would be the ongoing problems with certain doors not locking or opening with key fobs. Probably have had to go back to dealer 6 times(guessing) for these issues. One problem gets fixed then another door will not work!!! Till now our extended warrantee has covered the cost. Now the rear door will not lock. Apparently, its a wire harness issue which is going to cost almost 500$ to fix. They tell us warrantee doesn't cover this!!! We aren't sure why not. Seems like on odd thing to break/not work on a seldom used back door. (a hard thing to damage or abuse). Surely not something that would normally wear out as to not be under warrantee!! The service department at Sullivan Honda is excellent: just kind of wish they would be the ones working on our vehicle. Never had a vehicle with only 80000 miles on it have so many issues leaving us with second thoughts about vehicle make and extended warrantees.