Kate Wagner has an amazing blog about McMansions and has also written some really good pieces about architecture and residential real estate on curbed.com. And she has recently become a cyclist and a big fan of pro cycling.
I looked at a bunch of McMansions before I bought a 1,000 sq ft bungalow built in 1912. The biggest problem is that they clear cut a forest and then pack the houses in so close together that you can reach out your window and shake your next door neighbor's hand. There are no front porches. On weekends, everyone opens up their garage door and hangs out in their garage. Streets end up being full of everyone's cars because they fill their garage with junk. So, kids really have no room to play. There are some developments that have really nice amenities (big pools with waterslides, trail system, tennis courts, golf, etc.) and schools are pretty good, but too big. But in the end, they are just too soul sucking.
Construction quality in McMansions varies wildly. In some states, builders are licensed and the trades are unionized and pretty strict about construction quality and won't cut corners. In other states, builders create an LLC to build a few dozen houses as cheaply as possible, drain all the money out and set up a new LLC for the next development. Everything is built to last ten years and a day (the market standard builder's warranty on new construction). Then everything falls apart.
https://mcmansionhell.com/