Your message has a serious errors;
"it alters proteins and DNA in cancerous cells (as well in normal cells); when cancerous cells, which have an already altered DNA,"
Cancer cells have not an altered DNA. If they have, an immune system have to kill them.
"O-O bonds in the cell, which involves mitochondria and the breathing process of the cell (cancer is oxygen hungry; when you target the source it feeds from, the cell dies)"
Cancer cells are not an oxygen hungry because they do not burn glucose in oxygen but in the lack of oxygen they carry out glucose fermentations to achieve an energy.
There is a fundamental knowledge about cancer cells vs healthy cells which You don't have.