Monsanto was evil (they don't exist anymore, though bayer may well be worse) doesn't mean that they are wrong.
radio waves are classified as possible carcinogens.
Glyphosate is 2a, "probably carcinogenic".
Note that the IARC categories are not very useful by themselves because they are only non-quantitative assessments of whether the evidence supports carcinogenicity, they are not assessments of how carcinogenic a substance actually is.
Certainly there is no evidence that glyphosate is some horrific, world ending super toxin. Some studies have found that there is an elevated cancer risk with extensive occupational exposure, other studies have not found that.
If I was going to do a cancer risk audit of my own life, reducing or eliminating the use of glyphosate from my own garden would not be on the top 50 things I would do.