I'd encourage you to read this[1] article as it seems you are confused about what the phrase "probably carcinogenic" means in the context of the IARC report. In particular, the report does not assess risk which is what you care about when making a (rational) choice to avoid/not avoid particular substances in your diet. Interestingly, the WHO does report on risk and in their evaluation they found "glyphosate unlikely to pose a carcinogenic risk to humans from exposure through the diet"[2].

[1] https://www.wired.com/2016/05/monsantos-roundup-herbicide-ca...

[2] http://www.who.int/foodsafety/jmprsummary2016.pdf?ua=1