Just saying, not my experience. I have used linux for over 25 years and nontechnical users in my family have also for almost 20 years. By in large it has worked just fine.
The big issue is Linux is not the OS that is supplied when people go to the store and buy something (well except for Android and Chromebooks which are Linux and are popular). It is also not the system or have the apps their friends use. It also does not have the huge supply, support, and word of mouth ecosystem. Buying hardware especially addons is confusing. Getting support is hard unless you have friends that use. Buying Linux preinstalled often costs more. Change too is hard and there has to be some driver and for most people there is not.