Help needed - fix the backrest of this stool in textiles

I’d like to see if anyone might be willing to take on the challenge of fixing the back of this stool for the textiles computer. Fundamentally a poor initial design, the back of this thing has now gotten so bent, that it has turned into a hazard.

Would anyone like to take a crack at fixing it up? Technique and strategy is up to you

I have seen people flip over on that chair.