Why would any of those things happen when none of the potential union members want them either? A union is democratic after all and does not automatically have

Why would any of those things happen when none of the potential union members want them either? A union is democratic after all and does not automatically have legal agreements with the company or requirements from other employees. No one want's to protect under-performers for whom they'd have to pick up the slack. And no one wants their compensation set arbitrarily. Especially since in software anyone can jump ship and find performance based compensation somewhere else. They just want to work the hours specified in the employment contract rather than being singled out in isolation from each other and required to work far beyond the amount contractually agreed on under threat of termination. So you'd just have a group that discuses abusive uncompensated overtime and request changes in a united way. Because a single person complaining or quitting over mistreatment has zero impact.