The Samsung Pass auto fill is quite easy. Not sure why you say difficult? You didn't try that? In websites/apps, you just click the field, the Samsung Pass icon will pop up, just tap it, authenticate using finger/iris and the fields are filled in.
In the smarthings app, you can create dashboards for controlling your device. Maybe you want to look at that first before saying it is difficult. One good thing about it, I can control (Samsung) smart appliances like washer, aircon, etc. HomeKit is still child's play