Well hold on a bit there. It's a big assumption that people who like this incubator haven't done their due diligence. A lot of very experienced people use this incubator, it's quite popular.
I myself have 2 (both made in '22), and have had a dozen good hatches.
There are many factors that can lead to success or failure with a particular incubator. A type that's better insulated with styrofoam may work better in some home environments.
Personally, I never could stand fiddling with those wafer thermostats.
I do think it's a mistake to fiddle with this incubator as if it was a wafer type. Just check that its internal thermostat matches a calibrated thermometer. Make sure it's placed in an area of the home that isn't drafty or colder than 70 or so.
I set it up, check it, and leave it to do its job. That's my experience, but if you're having bad experiences you should definitely try something else.