Preschooler extremely picky eater. Help!!!!!

So ever since I started solids with her it was never smooth i tried every trick in the book but nothing helped ultimately doctors and family alike told me to just wait it out and now she’s almost five and still refuses to eat normal food there’s a few rhings she eats and that’s it she straight up refuses to try any new has tantrums or the point of passing out over trying new foods im at a loss for what to do i cry about it so much i feel like a failure as a mother someone please any tips or words of encouragement