Your scarring appears to be moderately deep rolling scars. Because they're on the bonier parts of your face (near your eyes/temples) they should respond pretty well to treatment. The catch though is that for your scarring you have to go hard or go home. Your home Dermaroller treatments aren't going to cut it, sorry to be the bearer of bad news. Don't waste any more money on microdermabrasion treatments. They do nothing for scarring, not even superficial scarring. The retin-a though is something that I would definitely continue to use. Retin-a is the bees knees for cell regeneration. Keep using it!
If I were you, I would look into professional eDermastamp treatments! Still skin needling but on a different level. The eDermastamp (the German made one) is amazing (I've had one treatment and am going in for another in a few weeks time). The needles can be adjusted mid-treatment so that the length varies between 0.5mm to 2.00mm. The physician will know how deep to go to get to the root of your scarring. There's no pain (really, I'm not lying!) and the downtime is significantly less than that of the Dermaroller.
Then, once you've improved your skin as much as you can with skin needling I would look into two more options: subscision and fillers.
If you have any lingering deeper scars that didn't respond as well as you'd liked from the skin needling (I have two small rolling scars in this boat) then I'd look into subscision for these. You could even combine that with a filler and/or the subscision-suck method which has proven to yield excellent results.
I would look at fillers as being your last step. Leave fillers for when all other modalities have given you their best possible result. Fillers are temporary (unless you go with silicone which I highly recommend you avoid like the plague) so in my opinion they should be used after you've gotten your permanent results from other treatments.
The most important thing though is patience. This isn't an overnight cure but with a little persistence you'll get what you want!
Also, remember this: your scars do not define who you are. They should not control you. You have one life, one body, one chance at living how you want to live. Think about how big the universe is and how much time you have to explore it. Don't let your scars hold you back. The world can be a cruel place and sometimes we're going to feel like we don't fit in but don't ever let yourself believe that you're sub-par, because you're not. x