Can I reply to posts by "ocdtrekkie" that are not true about Google? I mean basically every post he shares is something negative about Google and in best case

Can I reply to posts by "ocdtrekkie" that are not true about Google? I mean basically every post he shares is something negative about Google and in best case is a half truth. I would just like to see things be accurate. I am an engineer by background and maybe a bit OCD on things being factual. Also is it allowed to have every post go after one company?