Exactly. Look at the back side of the store bought marinade bottle and you will find some truly vile shit.
Sometimes, I'll do a simple lime, avocado oil, and whatever rub I deem appropriate for the protein.
You wanna get fancy? Blend an onion, a stick of achiote, garlic and squeeze a whole orange and lime into the blender. A little water to dissolve. Pulse that shit smooth. Salt and pepper to taste. Mix and pour into the ziplock full of quarter legs. You can go up to 2 days on the marinade but overnight works.
Off the bone chicken. Takes on mesquite smoke, beautifully champ.