You cannot simplify the CSS selectors used as such. But depending on the markup (about which you do not say anything), it may be possible to refer to the same elements using simpler selectors.
For example, if classes like generic_radio_1
are only used, and will only be used, for the specific elements that you wish to refer to, then there is no need to use the selector .customRadioNPS
before class selectors like .generic_radio_1
(except in the unlikely case that you have other rules that apply to those elements, too, and you need selectors with higher specificity to override them).