"Lamb Weston and McCain alone control 70 percent of the market" hides that McCain holds about 30% of the US market.
McCain treat Simplot as their main rival in most jurisdictions, and have been involved in multiple legal fights with them - one of which is a patent issue that started in 2002 (no. 6,821,540), and is still ongoing. (Currently favouring Simplot).
There's a lot here that feels like... Bad statistics. Not to say that there's no truth in the accusations - but they don't seem to be acting in good faith, and that will wreck them when it comes to the court.