Our house is in kind of a hollow despite being in a city, and I (and guests - all networks seem just as bad) get one bar basically all the time at home.

Phone calls are hit-and miss without WiFi calling switched on.

My house is also like this. No signal on any carrier, and same with one of my neighbors but not neighbor on the opposite side.

Looking at satellite view it is clear that the local municipal water tower is between a huge cell tower near the highway and my house. All carriers seem to lease that same tower only in my area.

It wasn’t like this when I moved in but I guess the carriers consolidated on that big tower near the highway about two years ago.

Radio shadows are a thing I guess.