Unruly hair

Eva

So my hair is honestly a train wreck. A good 75% of it fell out, it’s damaged (and i barely use heat on it) and I’ve done everything I can do try to nurse it back to health. My diet is good, I’ve tried cutting off split ends, I’ve done all the oil treatments, changed my shampoos and conditioners, everything. My hair still isn’t returning back to the way it was? Right now there’s no excessive falling but it’s still so damaged and dry. The only way it can look remotely good is if I go to the salon to get it done. Please help thanks