I'm so sorry to hear that you're dealing with the burn. I hear you. My takedown was a little over 3 months ago. I had no real burn at the beginning, but a few weeks in, I was having just this debilitating burn that prevented me from leaving the house or going anywhere without a shower bidet. No amount of creme helped me. The only thing that seemed to help the burn once it started up was a pressurized stream of warm/hot water from the bidet, so I got used to the routine of 75% of my BMs using that when I finished, since I knew no matter what, my anal area was going to start burning pretty bad after each bowel movement. After washing, I'd dry the irritated area and let it relax, and when it was calm, I'd apply bum cream (I use the Baza moisture barrier). I think in the long run, the cream prob helped small cracks in my anal area to heal.
About 2 months in, I couldn't leave to go anywhere so I got a Rx for oral questran powder. If none of the topical creams have helped you, then this should at least have some effect. It reduced my burning BMs to only about 50%, and mostly in the evenings, since I'd take the powder in the morning (it interacts with many medications, so I had to wake up early to take those) and it would neutralize the burning for at least the first several through the day most days.
A little over a week ago, the burning magically stopped. I'm so grateful. I can finally use the toilet outside without fear of needing my shower bidet. I still use the Baza protective ointment before and after each BM to protect my skin, and I'm still on the questran. I will try going off the questran and see if the burning comes back. I wish you all the best and am so sorry you've had to deal with those so long.