I have worked for a rescue charity and though you want to shame them, it’s really not a good idea as they were usually trying to do the best for their animal under difficult circumstances. Though sometimes animals would be_returned_ to us after being adopted for dumb reasons so I think those people did deserve some shame but the ones just trying navigate a bad hand, I didn’t feel too bad about. Life can be tough and unpredictable.
The ones who would just tie their dogs to the gate and drive off though, those people deserve plenty of shame.
I’m talking about things more like “the dog kept standing in front of the tv when we’re trying to watch football” kind of stupid.
As to your point, that’s why rehoming questionnaires should be detailed and all dogs should be assessed properly. Not every collie will be good on a farm and not all labradors will be good in a family home. Sadly, not all rehoming centres have the same time or resources as the well funded, shiny ones.