Why can’t I get this right?!

500g Robin Hood all purpose flour 370g warm water 100g starter at peak 10g salt

Mixed dough at 7:30pm and let it rest for 30 minutes. Then did four sets of stretch and folds 30 minutes apart. Left it on the counter overnight at approximately 68F. When I woke up at 7:30am, there was hardly any rise. I had an aliquot jar which showed very little rise. The first line on the jar is the original dough line after the first stretch and fold. I put the dough in the oven with light on and kept checking that it wasn't overheating. I left it there until 1pm. It had a lot of bubbles on top but was lacking structure. I tried to shape it and it was very sticky and difficult. I let it bench rest for 30 minutes then shaped best I could and put it in a banneton in the fridge for 30 minutes.

Oven was preheated to 500 for an hour. The dough was hard to score. I put it in a cold Dutch oven and into the oven covered at 475 for 30 minutes then uncovered at 450 for 20 minutes.