Thank you! I hope the avocado adventures never end! Same to you, hopefully we all will be able to grow stronger after rough times. You also taked about something quite important, the usefulness of communication, and even with a plant you can share not only opinions but empathic thoughts and emotions. So, kudos to you for bringing people together to share, learn and to help!
I took another reading at your post, just in case I left out anything you said, and I think I can give you one more trick. Get vaseline and a small/medium size brush and apply it carefully, painting with a thin layer everything from the trunk, branches and leaves (only the upside part), the more you do a good job around the sprouts the better. Make sure it doesn't get too sticky though, just an even and thin layer will do the trick. You will notice inmediately how everything painted will look brighter and brought to life, and that helps the plant against its dehydration. After giving it a little more thought I think that besides the soil, you also need to understand how humidity functions around a plant. In the case of an avocado, everything has to be moisted enough (even the air), and the vaseline will help with everything above the soil, it will be now up to you to figure how to fix the soil, remember that an avocado root system is super fragile and if you stress it enough the plant will die, so you shouldn't make any aocado plant strive too long for water, just keep the humidity levels at a friendly zone for them (Here I try to water them even twice or three times a day, and where you have this one may be as dry as my climate). I only recommend for an avocado to be transplanted when your going to a much bigger pot or space in the ground. but without damaging or pressing in any way its roots! You have to be very careful about that, I have lost many avocado plants because of that lack of humidity and a concrete-like pressed soil. The vaseline will help to make the plant a lot stronger from the ground up, but the roots are another story, so, the best of luck with that. Hope you can do this trick and if you need some asistance I can maybe record a clip and post it, or upload a couple of more pics. Take care and happy growing!