As review in video makes clear, Kirkland powder is really nothing more than standard "commercial" type laundry detergent. Inexpensive, no frills and will get the job done in theory.
Similar powder detergents Sun, Arm and Hammer or "commercial" products like Hurricane and others that come in huge tubs or boxes are all same. Largely surfactants, washing soda, OBA, fragrance, and maybe some other bits. Heavy on washing soda and fillers these products don't make much suds because good part of cleaning action comes from chemical (all that washing soda or other alkaline substances). You'd best take a tip from commercial laundries and use some sort of sour in final rinse or a sour/softener unless want hard scratchy things.
Of course industrial laundries have a host of additives they can use in conjunction with basic detergents. Emulsifiers, breaks, enzymes, oxygen or chlorine bleach....
Telling thing is people use this Kirkland powder detergent for cleaning floors and walls. That's saying something....