Throwing food

My boy is constantly throwing his food on the floor. No matter what I offer him or if it’s his most favourite food, every meal time 90% of his food goes on the floor. I’ve tried cutting it up smaller/offering it bigger/putting it on his tray one piece at a time/putting it all on his tray/telling him food stays up and in his tummy but whatever I do I can’t seem to get him to eat. He eats so little as most goes on the floor. He used to love his food when he was weaning. I’ve gone back to spoon feeding but even then he just spits out the food and throws that instead. He was breastfed but I weaned him onto oatmilk a couple of months ago. He has a 6oz bottle after he wakes and after lunch and then an 8oz bottle at night after dinner before bed. Is he having too much milk and this is affecting his appetite?