BBQ sauce is a sugary concoction of artificial flavor enhancers, seed oils, and refined thickeners, masquerading as a condiment. You wouldn't catch a Pitmaster lathering this on a rack of ribs. Just use real seasonings and a bit of patience.
Why trash
Check the first ingredient — it's almost always high fructose corn syrup, not tomatoes.
Try instead
Coconut aminos, apple cider vinegar, or citrus juice.