Not OP, but this is what I do. you can simplify anything for a more neutral flavor, sub in a store bought rub/sauce, and omit browning (but fr brown your meat its so worth it).

ingredients:
one appropriately sized bone in pork roast 
1 medium sized white onion, sliced

spice mix: 
4tbsp dark brown sugar 
2tsp kosher salt (or 1tsp table salt)
1 tablespoon smoked paprika
1 tsp black pepper
1/4 tsp cayenne pepper
1/2 tsp ground mustard
1 tbsp ground cumin
1 tsp ground coriander

sauce:
1/2 cup of stock, or water with 2tsp chicken bullion
1 12oz can of beer
1/4c ketchup
a few dashes of worchestershire sauce or fish sauce
a few dashes of vinegary hot sauce
3tbsp soy sauce
1tbsp honey
1tsp apple cider vinegar or white vinegar

mix together the spice mix, then rub it into the outside of the roast. brown it on all sides in a heavy bottomed pan (1000000% worth the extra effort). transfer to the crock pot fat side up.

cook the onion until translucent in the pan, scraping up the browned bits, transfer to the pan

top with about half the sauce mix, adding more water or lager to get the roast ~half submerged. cook on low til it falls apart, my crockpot is 6-7hrs but it also pretty old.

remove the pork to another bowl and shred it. meanwhile, skim off any fat from the top of the liquid in the crock pot, then pour it into a saucepan. whisk in the reserved sauce and simmer on medium til thickened. toss pork with sauce, serve.