Also, just to add a little spice to this, it was outright said while Superman was being controlled, he was acting intellectually BRILLIANT. Making tactically brilliant decisions...
https://static.comicvine.com/uploads/original/6/67985/2814852-dcp_essentials___superman__sacrifice___dc____compiled_by_kritter_dcp___page_52.jpg
https://static.comicvine.com/uploads/original/6/67985/2814854-dcp_essentials___superman__sacrifice___dc____compiled_by_kritter_dcp___page_53.jpg
It was so strategically done so well that Martian Manhunter thought mind control couldnt play a factor in something like that.