All the bedrooms under 90 sq ft? Pretty small... if I may ask, how many sq ft was the house itself? 700 sq ft ish? More? My own house is on the smaller side, but even the smallest bedroom is bigger than that, if not by much (meant more as a guest room, or office than a full bedroom). Of course, I make up for that smaller size with the finished basement.
Still.. that size could work for someone whom does not need a lot in the way of space needs, or serve as a starter house. I once considered looking at smaller 600-800sq ft ranches for cost efficiency myself, but decided on bigger as like you I disliked the floor layouts I saw at the 600-800sq ft options available. May still look at such a thing in my retirement years, but that is fairly far off still.
Supposedly, new house construction in the U.S. has the average floor space of the new builds in recent years at around 2300 sq ft, that is a drop from a few years ago, when it was nearing 2700 sq ft... to be honest, I find that way larger than most should need.
I know some people in expensive areas have ridiculously small apartments, but that does not compare to houses.