I would recommend leave in conditioner from Cantù. It’s really nice and feels good, hydrates my hair so much, and isn’t expensive. Personally, I use the men’s version (I compared the men’s and women’s ingredients, which were exactly the same, but men’s was cheaper) and I’ve had one container for almost 3 years now. A little bit truly does go a very long way, trust me
Accurate can dry out the hair pretty bad, idk what ways you have already tried but here are my suggestions. To help combat this your hair need ALOT of moisture and products to retain moisture. Look for hydrating shampoos that are gentle on frizzy hair, try to limit the amount of times you wash your hair, deep condition weekly (maybe even twice a week) I would suggest with a conditioning mask, and a protein hair mask because protein can help repair the hair shaft. Oil the end of the hair everyday
You don’t even need to use a lot of oil, but after you wash your hair, when your hair is about 50% dry put some oil in so it can lock in some of that water and especially on the days you skip hair washing so it doesn’t get dried out by the environment. Most important of all try very hard to drink LOTS of water! Drinking lots of water helps the body repair the hair on the inside.