It just all comes across as very elitist navel gazing.
I don't actually care what other peoples properties look like.
It's also kind of faux populist because while the homes they are criticizing are certainly higher income for their area, a lot of these are like $500K homes in exurbs.
The people that enjoy laughing at the McMansions are like SF/NYC $5M condo owners. So it's kicking down in a way they can rationalize to themselves.