I cannot for the life of me fathom how any 6+ owner can be happy with it but hey, some obviously are. The majority even. I do struggle to understand it.
It's pretty simple. Some people enjoy the phones for what they are instead of obsessing over what they aren't.
Again, the only way someone got hosed with a 6/6+ is if they feel they got hosed. If someone doesn't notice the issues or doesn't care, then it's hard to say they got hosed.
Did my safari tabs reload? Sure. Did I get a few app crashes? Once every so often, not enough to ruin the experience of using the phone. Did my phone reboot on its own? Again, every so often, very rarely, and not frequently enough to ruin the experience.
Now maybe you'd argue that those issues shouldn't have existed at all, but I was willing to put up with them for the larger high resolution screen and Apple Pay. I have a 6s Plus now, it's running great, but I don't regret the year I spent with the 6 Plus at all. I got my money's worth out of it.
Getting hosed would be selling a phone that can't make phone calls, or selling a smartphone which only registers touches 2/3 of the time. Those are serious deal breakers that anyone could agree would ruin the phone experience. The lack of RAM in the 6 Plus was a minor annoyance at worst.
Obviously different people have different tolerances for these sorts of things, but it's silly to make a blanket statement and say these issues make the phone a bad buy for EVERYONE when only a few people actually care about those issues.