Vaheguru ji Ka Khalsa
Vaheguru ji Ki Fateh, ji
Not all sardars are Sikh! From my mom's side, her grandfather was a devout punjabi shaivite and he was a sardar who kept kesh and wore a pagh. Even today if you visit popular tiriths you will see sadhus with uncut kesh and paghs. If someone denies being a sikh, then that especially means they are not sikhs, it answers the question!! & don't you cut your dhari as well (according to your old posts)? Vaheguru ji Ka Khalsa Vaheguru ji Ki Fateh
As you've stated you are an Amritdhari, then you know you should do your Nitmem. Chaupai Sahib ji you probably already do and do or listen to Sukhmani Sahib ji.
Some shabads that you may want to recite too:
Do you do Mool Mantar and Gurmantar? Maybe do this whilst you are doing the household chores?
One thing is we cannot change people. But change ourselves instead, so that may have a different effect on them.