When will eating get better?

I have an 11 month old, soon to be 12 month who eats very little solids. I'm talking maybe 1 baby tablespoon at a meal and maybe 1 more mouthful of food which he eats with his hands. I tried BLW, I tried different types of spoons, I tried blending food better, I tried textured foods. I've read recipe books for baby, I also gave him what we are eating. I tried everything to get him to eat more. He refuses the high chair and screams bloody murder when I try to even put him in it. I am scared because I know that at 1, babies need to be weaned off bottles ( my baby is bottle fed). I don't think he will give up his bottles anytime soon and weaning will be a pain. His poor eating and constant rejection of food, plus throwing it on the floor, rejecting the high chair and having to feed him while I hold him have caused me a lot of internal rage that I am barely managing. I don't take it out on the baby but I am very short fused with my husband.

When does eating get better? If your baby was bottle fed when did you wean off bottles? How did you do it?