I can relate, and I still have issues with tangling when I experiment around with products.
For me, I try to make sure my hair isn't that tangled before I wash it, so if there are any snarls I can loosen by hand, I try to do that first. When I shampoo, I don't pile all my hair on my head; I wash my scalp and then work or squeeze the suds down my ends. My hair stays essentially parted down the center the whole time. When I use a rinse out conditioner, I try to avoid piling my hair up, and when I'm rinsing the conditioner out, I use a wide tooth comb to loosen tangles as the water rinses over it.
After washing, I pat my hair dry with a towel, but leave it rather damp. I find detangling works best if I use a little bit of oil and a little bit of spray on leave in conditioners. I detangle small sections at a time, and the sections I'm not working with I clip the length so it doesn't retangle. I'll even spritz with water to dampen sections that may have dried out.
That all might sound complicated but it really isn't, it just becomes habit.
I think products matter too, but some products don't work for everyone. Here are the products that have helped me with combouts. I know you'll get tons of other recommendations. Try to buy samples first
*VO5 hot oil tubes
*L'oreal Kids Shampoo (great for tangles, honest!)
*Aubrey's Seabuckthorn Conditioner
*Aubrey's GPB
*Joico K-pak smoothing balm as a leave-in
*Tiny bit of wildgrowth oil and leave-in conditioner (they work best together, to me!) ...