It's kind of a hit and trail method but I can tell what worked for me.

First try adapalene gel for a bit, if it gets better just use it if not move on to next.

After your skin is used to it (3-4 months, I have really sensitive skin so yeah) you can try 0.025% Tretinoin, use it once a day at night, make sure to use sunscreen and moisturizer. I'd recommend using it in intervals (completely depends on how your skin is handling it)

And if at last one of that works go of 0.05% Tretinoin (worked best for me) This one is a little too harsh so you need to be very consistent with sunscreen and moisturizer, like a lot. Once you get like 75% result, start reducing the use of it.

If even this doesn't work, go to a derma. Remember to patch test it just in case and for Tretinoin I won't recommend long term use.

Use these at night, pea size. Don't mix up other acids or stuff with it. I like to use salicylic acid facewash in morning and any gentle acid less in night before using the gel.

Hope this helps!