Weaning help please 🆘

My little boy has just turned 9 months, I have struggled from the start to get him to eat much of anything. I have tried BLW and puréed food, he definitely prefers BLW but he doesn’t eat anywhere near as much as if I manage to get some puree in him, most of it goes on the floor. He took a liking to Heinz porridge (I know the quantity of oats is actually poor but it’s the only thing he’d eat) so for breakfast he would have porridge and prunes and for dinner I blended loads of veg and popped in ice cube trays so we started giving him 3 cubes of veg in his porridge which he did enjoy. The last week or so he has stopped finishing his porridge and has also gone off his milk completely. So much so he screams, arches his back and zips his mouth shout. Losing the will, not sure what solutions/advice anyone has or maybe someone else is experiencing the same so I feel less alone. 😩😩